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Device drivers are software that lets Windows communicate with and control hardware. They enable devices such as printers, graphics cards, Wi-Fi adapters, storage devices, webcams, keyboards, and USB devices to work, and help applications use device-specific functions through Windows.
Without a compatible driver, a device may be undetected, have limited functionality, or fail to work. Faulty, incompatible, or blocked drivers can also cause instability or prevent applications that depend on them from starting.
What is a device driver?
A device driver is software that provides an operating-system interface for a hardware device. It translates requests between Windows and the device. For example, when an application prints a document, Windows passes the print request through the printer driver, which converts it into instructions the printer understands.
The same principle applies to other hardware:
| Hardware | What its driver helps Windows do |
|---|---|
| Graphics card | Use display outputs, 3D acceleration, video features, and supported resolutions |
| Network adapter | Connect to wired or wireless networks and exchange data |
| Printer | Send documents and printer-specific settings to the printer |
| Storage device | Communicate with storage devices and manage storage-related functions |
| Keyboard or mouse | Interpret input from the device |
| Webcam | Make the camera available to Windows and camera applications |
| USB device | Identify and operate the device through its USB interface |
Some drivers run in user mode, while others run in kernel mode. Windows applies a kernel policy that controls which kernel-mode drivers may load. A defective driver can affect system stability or fail to load. Microsoft explains Windows driver policy.
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What are device drivers used for?
1. Making hardware usable by Windows
Windows cannot automatically understand every hardware design. A driver supplies device-specific instructions needed to initialize and operate the component. Without a compatible driver, hardware may not appear in Windows, may have limited functionality, or may be unusable.
For instance, a basic display driver may let a monitor show an image, while a manufacturer’s graphics driver may be needed for proper acceleration or advanced display features.
2. Providing a standard interface for applications
Applications generally do not need to know the internal commands of every printer, camera, audio device, or graphics card. They communicate with Windows through standard interfaces, while the driver handles hardware-specific work.
This separation allows an application to support many compatible devices instead of containing separate low-level instructions for each model.
3. Enabling device-specific features
A driver can expose functions that are not available through a generic Windows driver. Depending on the hardware, these may include:
- GPU acceleration and multiple-monitor features
- Printer trays, duplex printing, and paper-size controls
- Touchpad gestures and special function keys
- Wireless adapter capabilities and power management
- Camera controls and microphone integration
- Storage-controller features and performance improvements
4. Handling communication and power management
Drivers also help Windows manage how a device communicates, starts, stops, enters low-power states, and responds to hardware events. A driver problem can therefore appear as intermittent disconnects, failed wake-up operations, USB errors, network drops, or a device that works only after a restart.
Why are device drivers important?
Hardware depends on compatibility
A driver must match the hardware and support the installed Windows version and system architecture. A package intended for a different device or Windows configuration may fail to install or cause malfunctions. Microsoft recommends getting downloaded drivers from the device manufacturer’s official website and checking compatibility before installing them. See Microsoft’s driver update guidance.
Faulty drivers can cause more than missing features
A driver can be the source of:
- A device missing from Device Manager
- Warning icons and device error codes
- Audio, network, camera, printer, or display failures
- Applications that depend on a driver failing to start
- System instability or crashes
- A driver being blocked during loading for security reasons
A newer driver is not automatically the right driver for every computer. Packages can differ by model, Windows release, or hardware revision. Windows ranks compatible drivers rather than installing any package simply because it is newer.
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Because kernel-mode drivers have significant system access, Windows uses signing and policy controls to decide which drivers may load. New drivers are submitted and signed through the Windows Hardware Compatibility Program (WHCP) process.
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Microsoft says that with the April 2026 security update, drivers relying only on the expired cross-signed program are no longer trusted by default. Some may continue to work through the Windows Driver policy allow list, while others can be blocked when policy enforcement applies. A blocked driver may leave hardware unrecognized, disable a peripheral, or cause software that depends on that kernel driver to fail. Read Microsoft’s explanation of the Windows Driver policy.
The practical response is to obtain an updated WHCP-signed driver from the hardware or software vendor. Disabling security features or driver policy should not be the first troubleshooting step.
How to check drivers in Windows
Device Manager is the standard Windows interface for viewing devices, checking driver status, updating drivers, uninstalling them, and rolling back recent changes.
- Right-click the Start menu and select Device Manager. You can also search for Device Manager in Windows Search.
- Expand a category such as Display adapters, Printers, Network adapters, Cameras, or Universal Serial Bus controllers.
- Look for a warning icon, an unknown device, or a device that has disappeared after an update.
- Right-click the device and select Properties to view its status and the options on the Driver tab.
To view disconnected or previously installed devices, select View > Show hidden devices in Device Manager. Hidden entries are not automatically proof of a problem; some represent devices that are not currently connected. See Microsoft’s Device Manager guidance.
How to update a device driver
Use Device Manager
- Right-click Start and select Device Manager.
- Expand the relevant hardware category.
- Right-click the device and select Update driver.
- In Update Drivers, select Search automatically for updated driver software.
- If Windows does not find a driver, select Search for updated drivers on Windows Update, if that option is offered.
- Select Close when finished.
If Device Manager says, The best drivers for your device are already installed, it means Windows did not select a newer matching driver through that search. It does not prove the manufacturer has no newer package. For graphics cards, printers, laptops, and specialist hardware, check the official support page for the exact model. Microsoft’s instructions cover both Device Manager and manufacturer downloads.
Install a driver downloaded from the manufacturer
- Download the driver only from the hardware manufacturer’s official website.
- Confirm that it matches your Windows version, device model, and system architecture.
- Extract the download if it is compressed.
- Open Device Manager, expand the relevant category, right-click the device, and select Update driver.
- Select Browse my computer for drivers.
- Under Browse for drivers on your computer, select Browse….
- Choose the folder containing the driver, select OK, confirm the path, and select Next.
- Select Close after installation.
Some manufacturers provide a setup program instead. Use that program only when it is intended for the exact device and Windows configuration.
How to reinstall or roll back a driver
Reinstall a driver
Reinstalling can help when a device stops working after driver files are corrupted or incomplete.
- Open Start > Device Manager.
- Expand the device category.
- Right-click the device and select Uninstall device.
- In Uninstall Device, select Uninstall.
- Restart through Start > Shut down or sign out > Restart.
After the restart, Windows attempts to reinstall the driver. Some devices, including some printers, may need manual installation. Uninstalling a device does not necessarily delete its driver package: Windows may retain it in the Driver Store and reinstall it automatically.
If you need to remove both the device and its package, disconnect the physical device first where possible. Then enable View > Show hidden devices, right-click the device, select Uninstall device, select Delete the driver software for this device in the confirmation window, and select OK. The checkbox may require administrator permissions, and Windows may not remove a package that is still used by another device.
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Roll back a recent driver change
Rollback is useful when a problem starts after Windows Update or a driver update.
- Open Device Manager and expand the relevant category.
- Right-click the device and select Properties.
- Open the Driver tab and select Roll Back Driver.
- Choose a reason, select Yes, and restart if prompted.
Rollback requires administrator permissions. The option may be unavailable if Windows has no previous driver version to restore. For the documented steps, see Microsoft’s driver update and rollback guidance.
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Managing drivers with PnPUtil
For more precise administration, Windows includes PnPUtil. Run Command Prompt or Windows Terminal as administrator before using commands that change drivers. Microsoft documents the PnPUtil command syntax and options.
| Command | Purpose |
|---|---|
| pnputil /enum-drivers | Lists third-party driver packages in the Driver Store |
| pnputil /enum-drivers /files | Lists files in each package; available from Windows 11, version 22H2 |
| pnputil /enum-devices /problem | Lists devices that have reported problems |
| pnputil /scan-devices | Scans for hardware changes |
| pnputil /add-driver <filename.inf> /install | Adds an INF package to the Driver Store and installs it on matching devices |
| pnputil /delete-driver <oem#.inf> /uninstall | Removes a package from the Driver Store and uninstalls it from devices using it |
To inspect which drivers match a particular device, first obtain its instance ID and run:
pnputil /enum-devices /instanceid <device instance ID> /drivers
The /install option does not force a package onto a device when Windows ranks another compatible driver higher. Deleting a package that is still required can leave a device without a working driver, so do not remove packages simply because they are old.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When Memory Integrity blocks a driver
The Windows message A driver can’t load on this device means that Memory Integrity is preventing a driver from loading. The notification displays the driver and company names; record those details before troubleshooting. See Microsoft’s guidance for this message.
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Start > Settings > Privacy & security > Windows Security > Device Security > Core isolation details
On older Windows 10 installations, the Settings category is Update & Security instead of Privacy & security.
Turning Memory integrity off requires a restart and reduces protection. On a Secured-core PC, it also removes the device from its Secured-core state. Treat this as a compatibility trade-off, not a routine driver fix, and turn the protection back on after replacing the incompatible driver if possible.
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Are device drivers hardware or software?
Drivers are software. They provide Windows with the instructions and interface needed to communicate with hardware such as printers, graphics cards, storage devices, cameras, and network adapters.
Does Windows automatically install every driver I need?
Windows can install many drivers through Windows Update and Device Manager, but it may not have the newest or most device-specific package. If Device Manager reports that the best driver is already installed, check the exact model’s official manufacturer support page.
What happens if a device has no driver?
Windows may fail to detect it, show it as an unknown device, provide only basic functionality, or prevent an application that depends on the device driver from starting.
Does uninstalling a device permanently remove its driver?
No. Windows may keep the driver package in the Driver Store and reinstall it when the device is rediscovered. To remove a package, use the Device Manager deletion checkbox where available or the appropriate PnPUtil command.
Should I turn off Memory Integrity to make an old driver work?
Only as a carefully considered temporary compatibility measure. Microsoft recommends finding an updated compatible driver first because disabling Memory Integrity reduces Windows security protection and takes a Secured-core PC out of its Secured-core state.
Can I delete every old driver package listed by PnPUtil?
No. A package may still be used by one or more devices. Removing a required package can make hardware nonfunctional. Identify the package and its devices before using the delete-driver command.
The Bottom Line
Device drivers are the communication and control layer between Windows and hardware. They make devices detectable, expose device-specific functions, and let applications use hardware through standard Windows interfaces. Keep drivers compatible and properly signed, obtain updates from Windows Update or the hardware vendor, and use rollback or reinstall when a recent driver change causes trouble. Do not confuse Device Manager’s uninstall action with permanent package removal, and do not disable Memory Integrity before checking for a safer driver replacement.
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