Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more

VLC Media Player is a free, open-source player that handles most video and audio formats without a separate codec pack. On a typical Windows 11 computer, install the standard 64-bit version from VideoLAN, then use VLC’s Media menu to open local files, discs, network streams, and conversion tools.

This guide covers installation, playback, subtitles, default file associations, useful shortcuts, conversion, and fixes for common VLC problems.

Download the correct VLC version for Windows 11

Download VLC only from the official VideoLAN Windows download page. The page currently lists VLC 3.0.23 and separate packages for 32-bit, 64-bit, and ARM64 Windows systems.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
Windows 11 computer Download to choose
Most Intel- or AMD-based PCs Installer for 64bit version
Windows 11 ARM device Installer for ARM64 version
Older 32-bit Windows installation Installer for 32bit version
Managed business deployment MSI package
Portable use without a conventional installation ZIP or 7-Zip package

If you are unsure which processor architecture your PC uses, open Settings > System > About and check System type. Most Windows 11 Intel and AMD installations are 64-bit. Do not download VLC from a third-party software site or install a codec pack simply to use VLC; VLC includes its own codecs.

#1 Best Overall
Amicool External DVD Drive USB 3.0 USB C CD Burner CD/DVD +/-RW Optical Drive, Slim Portable DVD Player CD ROM Rewriter Writer Reader for Laptop Desktop PC Windows 11/10/8/7 MacBook Mac Linux OS Apple
  • 【PLUG & PLAY – EASY CONNECTION】 Simply connect the Amicool External DVD Drive to your computer’s USB or Type-C port, and it will usually be detected right away without the need for extra drivers. For stable operation and sufficient power, we recommend connecting it directly to a USB port on your computer (for desktops, use a rear motherboard port) and avoiding USB hubs or extension cables. This user-friendly design ensures quick setup for both beginners and professionals.
  • 【FAST & STABLE DATA TRANSMISSION】 Featuring dual interfaces (USB 3.0 and Type-C), this optical drive supports data transfer speeds up to 5Gbps. To ensure a reliable connection, please connect it directly to your computer. The drive supports multiple disc formats such as DVD+R, DVD-R, CD-R, and CD-RW. Please note: It does NOT support DVD-RAM, Blu-ray (BD) discs, or certain proprietary formats. Maximum DVD read speed is 8x, and maximum CD read/write speed is 24x.
  • 【UNIVERSAL COMPATIBILITY】 Compatible with Windows 11 / 10 / 8.1 / 7, Linux, and all macOS (Intel & Apple Silicon) for MacBook Air/Pro, iMac, Mac mini; NOT for iPad/iPhone/Apple TV/ChromeOS; for Mac, insert disc FIRST, connect directly to USB port (use a POWERED USB‑C hub for M1/M2/M3 to avoid insufficient power), and open media with VLC Player (Apple DVD Player not supported). Works with most computers from brands like Apple, Dell, HP, Lenovo, ASUS, Acer, and Samsung. 👉 Important: Designed specifically for computers. It is NOT compatible with TVs, tablets, game consoles (e.g., PlayStation, Xbox), car stereos, or standalone Blu-ray players.
  • 【SLIM & PORTABLE DESIGN – BUILT-IN CABLE, READY TO GO】With an integrated cable design, slim body, and stylish matte finish, this lightweight CD/DVD drive is both durable and portable. Easily slip it into your laptop bag or backpack and use it anytime, anywhere—perfect for business, travel, or home use
  • 【MULTIFUNCTIONAL & RELIABLE OPERATION】 Equipped with intelligent error correction and anti-shock technology, this drive supports reading, writing, and burning discs. If the drive is not recognized or a disc cannot be read, try restarting your computer or testing with a different, standard CD-R or DVD-R disc. The pop-up button and built-in cable design offer convenience and portability. For desktop PCs, connecting to a rear USB port is recommended for optimal power and performance.

How to install VLC Media Player on Windows 11

  1. Open the official VideoLAN download page.
  2. Select Installer for 64bit version, or select the ARM64 installer if your Windows 11 device uses an ARM processor.
  3. When the download completes, open the setup file from your browser’s Downloads folder.
  4. Approve the Windows User Account Control prompt by selecting Yes.
  5. Choose the installer language and select OK.
  6. On the welcome screen, select Next.
  7. Read the license information and select Next.
  8. Review the components and shortcuts. The default selection is suitable for most people, so select Next unless you need to change it.
  9. Confirm the installation folder. Select Browse if VLC must be installed somewhere other than the default location, then select Install.
  10. Wait for the installation to finish. Select Show details if you want to see the individual installation operations.
  11. Leave Run VLC media player selected if you want to launch VLC immediately, then select Finish.

The exact component list can vary slightly between VLC installer builds. The normal EXE installer is the easiest option for an individual Windows 11 user. The MSI package is more appropriate for administrators deploying VLC across multiple computers, while ZIP and 7-Zip downloads are useful when you want a portable-style copy rather than Start menu and file-association setup.

Start and close VLC

To start VLC, press the Windows key, type VLC, and select VLC media player. If the installer created shortcuts, you can also open it from the VideoLAN folder in the Start menu.

Close VLC with the window’s Close button, Alt+F4, or Media > Quit. The VLC quit shortcut is Ctrl+Q.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

Play a video or audio file

Open a file from VLC

  1. Open VLC.
  2. Select Media > Open File.
  3. Select the video or audio file.
  4. Select Open.

VLC starts playback immediately. You can also drag a file from File Explorer into VLC’s main window or playlist area.

Open several files

For a group of files, select Media > Open Multiple Files. This is also the option to use when you want to add a separate audio track. In the Open Media dialog, select Show more options or Play another media synchronously when those controls are needed.

Play a DVD, CD, VCD, or Blu-ray

  1. Insert the disc into the computer.
  2. In VLC, select Media > Open Disc.
  3. Select the media type: DVD, Blu-ray, Audio CD, or SVCD/VCD.
  4. Select the optical drive in the Disc Device list.
  5. Select Play.

Depending on the disc type, the dialog may let you select a title, chapter, audio track, or subtitle track. No DVD menus can be useful when a DVD menu fails to load.

VLC does not guarantee playback of every commercially copy-protected Blu-ray. Such discs may require additional files and configuration, and DVD playback can also be affected by the drive’s region-control behavior. VLC cannot burn CDs, DVDs, HD DVDs, or Blu-ray discs.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
Rank #2
Rioddas External CD/DVD Drive for Laptop, USB 3.0 CD DVD Player Portable +/-RW Burner CD ROM Reader Writer Disk Duplicator Compatible with Laptop Desktop PC Windows Apple Mac Pro MacBook Linux
  • Plug & Play. Easy to use, powered by USB port. No external driver or power adapter needed. Simply plug it into your USB port for automatic detection. For optimal performance on desktop computers, connect directly to a high-power USB port on the back of the motherboard. This hassle-free solution requires no technical setup, and if the drive isn't immediately recognized, trying a different USB port typically resolves most connection issues
  • High Speed & Reliable Performance. Compatible with USB 3.0 (backwards compatible with USB 2.0), this drive delivers fast data transfer speeds up to 5Gbps. Engineered with strong fault tolerance, it minimizes freezing, skipping, and errors during disc playback or burning. The stable performance ensures smooth, reliable operation and reduces the risk of defective performance
  • Intelligent Tech & Stable Connection. Features a physical eject button that safely releases discs even when your computer fails to recognize the drive—eliminating the common frustration of stuck media. Enhanced with copper mesh technology, this external component ensures consistently stable data transmission during all your reading and writing tasks
  • Trendy & Practical Design. Features a brushed texture shell for modern visual and tactile appeal. The innovative embedded cable design keeps your USB cable securely stored and always accessible, eliminating worries about misplacement. This compact, all-in-one solution is perfectly suited for easy transport and organized storage
  • Wide Compatibility. This external USB CD/DVD drive works with Windows 11/10/8.1/7/Vista/XP, Linux, and macOS 10.16+ (MacBook Pro/Air, iMac, Mac mini). Compatible with most laptops/desktops (HP, Dell, Lenovo, ASUS, Samsung). For optimal performance on desktops, connect to rear USB ports. Supported formats include CD-ROM/R/RW, DVD-ROM/R±RW/R±DL, and VCD. IMPORTANT: Not compatible with ChromeOS, smartphones, tablets, TVs, projectors, vehicles, or Blu-ray/4K discs. Please verify your device type before purchasing

Open a network stream

  1. Select Media > Open Network Stream.
  2. Enter the stream URL.
  3. Select Play.

The address must point to a media stream that VLC can access and decode. A URL for a webpage is not necessarily a direct stream URL. If a website address opens a page in a browser rather than playing in VLC, you probably need the service’s direct stream address instead.

Understand VLC’s main controls

The standard VLC window includes a menu bar, video display area, playback controls, position slider, volume controls, and status information. For a local file, the position slider shows progress through the file. For some live streams, VLC cannot determine the total duration, so the slider may not behave like a normal seek bar.

Full-screen playback

Select Video > Full Screen or press F. Press Esc to leave full screen.

Change the audio track or output device

  • To select a language or alternate audio track, use Audio > Audio Track.
  • To turn audio off, choose Disable in the Audio Track menu.
  • To change the speaker, headphones, or other output, use Audio > Audio Device.

Change the aspect ratio, crop, or zoom

Use the Video menu to choose Aspect Ratio, Crop, or Zoom. Available aspect-ratio choices include Default, 1:1, 4:3, 16:9, and 16:10, along with several widescreen ratios. Use Default when you want VLC to use the media’s normal dimensions.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

Use subtitles in VLC

Select or load subtitles

  • To select a subtitle track already included in the file, choose Subtitle > Subtitle Track.
  • To turn subtitles off, choose Subtitle > Subtitle Track > Disable.
  • To load a separate subtitle file, choose Subtitle > Add Subtitle File.

VLC supports common subtitle formats including .srt, .ass, .ssa, .sub, .idx, .smi, and several others. For VobSub subtitles, select the .idx file rather than the accompanying .sub file.

Some older VLC instructions place subtitle controls under Video. In the current Windows interface, look for the separate Subtitle menu.

Change subtitle size and font

  1. Select Tools > Preferences.
  2. Select Subtitles/OSD.
  3. Change Font, Font size, or another subtitle-rendering option.
  4. Select Save.
  5. Restart playback, or restart VLC if the change does not appear immediately.

Useful VLC keyboard shortcuts

Action Shortcut
Play or pause Space
Stop S
Full screen F
Leave full screen Esc
Speed up playback +
Slow down playback -
Return to normal speed =
Next item N
Previous item P
Increase volume Ctrl+Up
Decrease volume Ctrl+Down
Mute M
Jump backward Shift+Left
Jump forward Shift+Right
Quit VLC Ctrl+Q

Fix audio and subtitle synchronization

If voices do not match the actors’ mouths, adjust the audio during playback:

Rank #3
External CD/DVD Drive USB 3.0 Type-C Burner Writer Reader for Laptop/PC/Mac
  • Experience High-Speed Read/Write: This Type-C & USB 3.0 external CD/DVD drive delivers blazing-fast performance with up to 8x DVD rewrite/read speed and 24x CD write/read speed. Leveraging dual Type-C and USB 3.0 connectivity, it achieves maximum 5Gbps data transfer rates – ensuring seamless playback of music and movies, smooth software/system installation, and error-free disc burning
  • Plug and play, no driver required: Our product design is simple, providing a worry free experience - just plug it in, no need to install complex drivers. This design ensures efficient user use and provides users with a direct digital experience. Our product comes with USB-A and USB-C interfaces, and we believe these interfaces can adapt to your device and bring portable CD burning functionality to your laptop
  • Broad Compatibility:Our product is engineered for extensive compatibility, adapting to various formats and devices. Whether you're working on a PC, Mac, or other platforms(except for Chromebook, car platforms, tablets, and televisions), it effortlessly integrates into your digital ecosystem. With wide-ranging support for different file types and operating systems,you can trust our products to provide you with excellent experiences in CD burning, DVD burning, CD reading, and other aspects
  • Portable and Lightweight:Our optical drive stands out with its exceptional portability and lightweight design, measuring just 0.79 inches thick and weighing only 0.55 pounds. It easily fits into your handbag or backpack, making it perfect for use at the office, home, or on the go. Made from high-quality materials and featuring a sleek, minimalist design, this external cd/dvd drive is not only stylish and durable but also incredibly convenient . It supports multiple disc formats, offering you a seamless digital experience. Choose our optical drive and let portability and lightness become your trusted companions
  • Thoughtful service, thoughtful product: Our external DVD/CD burner uses a built-in cable, eliminating the hassle of cable storage. In addition, for your suggestions on after-sales issues with the product, you can also contact us through the methods provided in the user manual, and we will be happy to serve you.
  • Press J to move audio earlier relative to the video.
  • Press K to delay audio relative to the video.

Each press changes the offset by 50 milliseconds. You can also select Tools > Track Synchronization and enter an adjustment directly.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

For subtitles:

  • Press G to move subtitles earlier.
  • Press H to delay subtitles.

Subtitle timing also changes in 50-millisecond steps.

Take a screenshot from a video

Pause the video at the required frame and select Video > Take Snapshot. VLC saves snapshots as PNG files by default, usually in C:Users<username>Pictures. The documented Windows shortcut is Shift+S. If the shortcut does not work in your build, use the menu command; VLC documentation has also listed other snapshot shortcuts in older versions.

Convert a video or audio file

  1. Select Media > Convert/Save.
  2. Select Add, choose the source file, and select Open.
  3. Select Convert/Save.
  4. Choose an output format from the Profile list.
  5. Enter the destination path and file name in the destination field. Include the appropriate extension, such as .mp4 or .mp3.
  6. Select Start.

Conversion may re-encode the media, so it is not necessarily lossless. The selected profile controls the output container, video codec, audio codec, and related settings.

Make VLC the default player in Windows 11

Windows 11 assigns default applications mainly by file extension or protocol. The current method is not a VLC preference inside the program.

What’s actually slowing this PC down?

Pick the symptom - the matching free tool is one click away.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
  1. Open Settings.
  2. Select Apps > Default apps.
  3. Search for an extension such as .mp4, .mkv, or .mp3, or search for VLC media player.
  4. Select the current application beside the file type.
  5. Choose VLC media player.

To change one association from File Explorer, right-click a file and select Open with > Choose another app. Select VLC and enable Always use this app to open [extension] files if Windows displays that option. Repeat the process for each extension you want VLC to handle.

Change VLC preferences

Open Tools > Preferences. The dialog provides Simple and All settings modes. The main categories include:

Rank #4
BPAKDU External CD/DVD Drive for Laptop, DVD Player for Laptop, 8 in 1 USB 3.0 Ultra-Slim Portable, CD Burner External Disk Drive Optical Compatible with Desktop Mac,Windows 11/10/8/7 Linux
  • 【PROBLEMS SOLUTIONS】If your Windows 10/11 laptop PC cannot recognize this CD/DVD drive,Please connect the extra power cable to solve the problem of unrecognized caused by insufficient power supply.or you might find a solution by searching for "AyPhnwzyuoI" on YouTube. There are repair methods shown in the video that may help If it is not solved, reach out to us for a driver troubleshooting tool, the download link is not allowed here.
  • 【8 IN 1 Optical Drive】 Our portable DVD player is not only a CD/DVD reader, but also a CD/DVD burner, including 1 port USB 3.0 hub, 3 USB 2.0 port, SD or TF card reader and 1 USB-C Port, is perfect for transferring photo and video files from your camera by cards to your computer. (Note: SD and TF card cannot be used at the same time).
  • 【Plug and Play】 The external DVD drive is powered by a USB 3.0 port, no internal DVD driver and external power required, is the perfect companion for laptop or desktop that can be used directly by plugging it into USB port. No need for additional drivers. PLUG and PLAY. The CD Rom external drive for laptop has strong error correction, anti-skid and quiet capabilities.
  • 【Best Choice of Data Backup】Discs are designed to last up to 1,000 years, making them ideal for long-term data archiving and backup.a DVD Disce can store up to 4.7GB of data, equivalent to 2,000 photos/5 movies
  • 【USB 3.0 HIGH-SPEED DATA TRANSFER】CD Burner with high speed USB 3.0 technology, many of the port cluster connectors are labelled by blue color and backward compatible with USB 2.0. USB 3.0 is an updated version of USB 2.0 which provides higher data transfer rates up to 5 Gigabits/S (625MB/S). It is approximately 10 times faster than USB 2.0. Besides that, The cd drive offers Max 8x DVDR Read Speed and Max 24x CD Write/Read speed, faster than you expected.
  • Interface — window behavior and appearance
  • Audio — audio processing and output options
  • Video — video output settings
  • Subtitles/OSD — subtitle appearance and encoding
  • Input / Codecs — decoding and caching behavior
  • Hotkeys — keyboard controls

Select Save after making a change. Some settings require VLC or the current stream to be restarted.

Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Support on Ko-Fi

Fix common VLC problems on Windows 11

VLC opens, but the video is black, white, or distorted

  1. Update the graphics driver through your computer manufacturer or graphics-card manufacturer.
  2. In VLC, select Tools > Preferences > Video.
  3. Test a different video-output configuration.
  4. Select Save and restart VLC.

Video-output problems are commonly related to the display driver or the selected output configuration. Do not change several unrelated advanced settings at once; otherwise it becomes difficult to identify the setting that fixed the problem.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

Hardware decoding creates artifacts or playback errors

For image errors in H.264 or VC-1 video, open Tools > Preferences > Input / Codecs and test the Use GPU accelerated decoding setting in both states. Select Save and restart VLC after changing it. Hardware decoding can improve performance on some systems but cause problems on others.

H.264 playback is choppy

Possible causes include a heavily loaded CPU, graphics-driver problems, and unsuitable decoding settings. For troubleshooting, VideoLAN documents options under Tools > Preferences > Input / Codecs, including the H.264 in-loop deblocking setting and FFmpeg thread settings. Increasing disc-caching values can also help with problematic disc playback. These changes can reduce image quality or alter playback behavior, so restore the defaults if they do not help.

VLC crashes or will not start

If VLC opens, reset its preferences:

  1. Select Tools > Preferences.
  2. Select Reset Preferences.
  3. Select Save.
  4. Restart VLC.

If VLC will not start, use the VideoLAN > Reset VLC media preferences shortcut in the Start menu if it is available. As a last resort, close VLC and delete its settings folder under %appdata%. This removes custom VLC settings, so use it only after trying the reset option.

Subtitles contain the wrong characters

  1. Open Tools > Preferences.
  2. Select Subtitles/OSD.
  3. Change Default encoding.
  4. Select Save and restart playback.

The correct encoding depends on how the subtitle file was created. If one encoding produces incorrect characters, test another rather than changing the video settings.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

An AVI file says it is broken

The message “The AVI file is broken. Seeking not work correctly. Do you want to try to repair this?” indicates structural problems in the AVI file. Repairing the index may improve seeking, but the file can remain unreliable in other players.

Best Value
ORIGBELIE External CD DVD Drive for Laptop, USB 3.0 Type-C 13mm DVD Player
  • 【Plug & Play】This ORIGBELIE external CD DVD drive is powered by USB port, no additional drivers and power supply required! Just plug the USB type-A or type-C connector on the data cable to your computer and the CD burner will be detected by computer automatically, you can then use the corresponding software to read and write the discs with no complex settings. As for Mac system, please note that the computer will not display the device icon until the disc is placed and read successfully.
  • 【High-Speed】The external DVD drive supports USB 3.0 high speed data transmission and is backward compatible with USB 2.0 / 1.1. It delivers max 8x DVD read/write speeds and max 24x CD read/write speeds, provides faster data transfer rates of up to 5 Gbps (625MB/S) without lag or distortion, get more done in less time! It also boasts strong error correction capability, noise reduction, shock resistance and low power consumption.
  • 【Wide Compatibility】- This external cd drive supports various devices. It's compatible with Windows 11/ 10 / 8 / 7 / XP / 98 / SE / ME / 2000, Vista 7 / 8, Linux, Mac OS 10.6 or above such as Apple MacBook Air, iMac, Mac Mini and MacBook Pro. For desktops, please connect the DVD burner to the back USB port of the motherboard to avoid power shortage. (Not support for Cars, TV, Tablet, Phones, iPads, PS4/5, Xbox, Switch, Projectors, Chromebook, Surface (some models), Ubuntu system and blu ray disk)
  • 【All Kinds of Disc】This CD player for laptop support read and write various formats discs, e.g. CD±R/RW, CD-ROM, DVD±R/RW, DVD-ROM, DVD-RAM, DVD+R DL, DVD-R DL, VCD e SVCD. The CD drive also can be used to listen to music, watch movies, data backup, burn files, install software, operating systems or games. If the CDs or DVDs can't be read by computer, use the charging cable included in the packge to connect to 5V charger or power bank to get extra power, that's because some computer doesn't have enough power to support the operation of the USB DVD drive external.
  • 【Ultra Slim and Portable】Measuring just 13mm in thickness and weighing only 0.2 kg, the ORIGBELIE external optical drive is extremely slim and portable, taking up minimal space in travelling bag while on-the-go. Integrated data cable design, no need to worry about cable missing. What's more, its durable construction and anti-skid bottom ensure stable operation.

For persistent behavior, select Tools > Preferences > Input / Codecs > Demuxers > AVI, then change Force index creation from Ask to Always fix or Never fix.

An MP4 or 3GP file has video but no audio

Some mobile-phone files that use AMR audio do not work correctly in current stable VLC versions. This is a file- or codec-specific limitation; installing a Windows codec pack is not the normal fix. Try another copy of the file or convert the audio with a dedicated media-conversion tool.

Frequently misunderstood VLC features

  • VLC does not need a codec pack. It includes its own codecs for common formats.
  • VLC does not burn discs. It can play, stream, and convert media, but it cannot write CDs, DVDs, HD DVDs, or Blu-ray discs.
  • Blu-ray playback is not guaranteed. Commercial copy-protected discs may need additional configuration.
  • Default-player settings belong in Windows 11. Use Settings > Apps > Default apps, not older instructions that refer to a VLC “Set up associations” button.

For feature-specific details, consult the official VLC user documentation and the VideoLAN Windows FAQ.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

FAQ

Is VLC free on Windows 11?

Yes. VLC Media Player is free and open-source. Download it from VideoLAN’s official website rather than from an unrelated download portal.

Which VLC version should I install on Windows 11?

Use the 64-bit installer on most Intel- and AMD-based Windows 11 PCs. Use the ARM64 installer only on a Windows 11 ARM device.

Do I need a codec pack for VLC?

No. VLC includes its own codecs and normally plays common video and audio formats without an external codec pack.

Why is VLC not playing my Blu-ray?

VLC supports a Blu-ray source through Media > Open Disc, but commercially copy-protected Blu-rays may require additional files and configuration. Playback can also depend on the disc drive and region controls.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

Where does VLC save screenshots?

VLC saves PNG snapshots in the Windows Pictures folder by default, typically C:UsersPictures.

How do I reset VLC on Windows 11?

If VLC opens, use Tools > Preferences > Reset Preferences, select Save, and restart VLC. If it will not open, use VideoLAN > Reset VLC media preferences from Start if that shortcut is installed.

The Bottom Line

For most Windows 11 users, the setup is straightforward: download the 64-bit installer from VideoLAN, accept the normal installation options, and open files with Media > Open File or drag them into VLC. Use Settings > Apps > Default apps to assign VLC to specific extensions, and reset preferences before attempting more invasive troubleshooting.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

Free tools Windows power users keep installed

One-click scans. No signup required.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.