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

Is your Windows 10 PC lagging due to the disk usage reaching 100 %? No need to panic as this guide provides solutions to the problem.

Solution 1: Disable Notifications & Actions

Sometimes, unnecessary notifications and actions can be the cause of 100% disk usage in Windows 10. Hence, in order to fix the issue, you have to disable the notifications and actions.

To do this, follow the procedures below.

  1. Click on the Windows 10 search box and type “Settings”. From the search results, click Settings.
  1. When the Settings window opens, select System.
Fix 100 Disk Usage In Windows 10 By Disabling Notification & Actions
  1. Then, on the left pane of the System page, select Notifications & actions.
  1. After that, uncheck all the boxes on the Notifications & actions page, as shown in the screenshots below.
Fix 100 Disk Usage In Windows 10 By Disabling Notification & Actions

When you are done with that, restart your computer, and the disk usage should be reduced. However, if it didn’t, carry out the second solution below.

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.

Solution 2: Perform SFC and DISM Scans

Performing SFC and DISM scans can sometimes fix 100 disk usage in Windows 10. Hence, to run these scans, follow the steps below.

Popular on Amazon
Sale
Samsung SSD 870 EVO SATA III 2.5” 2TB, Read Speeds Up to 560MB/s | SATA Internal Solid State Drive, Upgrade PC or Laptop Memory & Storage for IT Pros, Creators, Everyday Users (MZ-77E2T0B/AM)
  • THE SSD ALL-STAR: The latest 870 EVO has indisputable performance, reliability and compatibility built upon Samsung's pioneering technology.Computer Platform:PC.Encryption : Class 0 (AES 256) TCG/Opal v2.0, MS eDrive (IEEE1667), Environmental Specs - Shock : 1,500 G & 0.5 ms (Half sine).
  • EXCELLENCE IN PERFORMANCE: Enjoy professional level SSD performance with 870 EVO, which maximizes the SATA interface limit to 560/530 MB/s sequential speeds, Accelerates write speeds and maintains long term high performance with a larger variable buffer
  • INDUSTRY DEFINING RELIABILITY: Meet the demands of every task from everyday computing to 8K video processing, with up to 2,400 TBW
  • MORE COMPATIBLE THAN EVER: 870 EVO has been compatibility tested for major host systems and applications, including chipsets, motherboards, NAS, and video recording devices. Interface- SATA 6GB/s, compatible with SATA 3GB/s and SATA 1.5GB/s interfaces
  1. Click the Windows 10 search box and type “cmd”.
  1. Then, right-click the Command Prompt app from the search result and select Run as administrator.
Fix 100 Disk Usage In Windows 10 By Performing SFC And DISM Scans
  1. After doing that, a User Account Control prompt will appear requesting permission for the app to make changes to your device. Click Yes to continue.
  1. After doing that, input the commands below one after the other to run the scans. However, wait for each scan to complete before inputting another command to run another scan.
SFC /scannow
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth
Fix 100 Disk Usage In Windows 10 By Performing SFC And DISM Scans

After the scans have been completed, restart your computer, and the issue should be fixed. Nevertheless, if the issue isn’t fixed, the last solution below should fix the problem.

Solution 3: Perform a Clean Boot

Clean boot is a process that removes 3rd party applications running in the background of your PC. Hence, performing a clean boot can actually fix the 100% disk usage in Windows 10 issue.

Follow the steps below to perform a clean boot on your Windows 10 computer.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
Also popular on Amazon
Sale
PNY CS900 250GB 2.5" SATA III Internal SSD | Up to 535/500MB/s R/W - PC/Laptop/HDD Upgrade for Everyday Users, Creators, Gamers, and more - SSD7CS900-250-RB
  • Upgrade your laptop or desktop computer and feel the difference with super-fast OS boot times and application loads
  • Exceptional performance offering up to 535MB/s seq. Read and 500MB/s seq. Write speeds
  • Superior performance as compared to traditional hard drives (HDD)
  • Ultra-low power consumption
  • Backwards compatible with SATA II 3GB/sec
  1. Press the Windows + R keys and type “msconfig”. Then, press OK.
Fix 100 Disk Usage In Windows 10 By Performing A Clean Boot
  1. By doing that, windows will open the System Configuration window, in which the General tab is selected by default.
  1. On the General tab, ensure Selective startup is selected. Also, make sure the Load system services and load startup items boxes are checked.
Fix 100 Disk Usage In Windows 10 By Performing A Clean Boot
  1. After that, switch to the Services tab and check the Hide All Microsoft Services box below.
Fix 100 Disk Usage In Windows 10 By Performing A Clean Boot
  1. Following that, click Disable all.
  1. Then, switch to the Startup tab and click Open Task Manager.
Fix 100 Disk Usage In Windows 10 By Performing A Clean Boot
  1. After doing that, the computer’s Task Manager should open, and the Startup tab will be selected by default. Hence, disable the applications you know you are not using.

    To do so, simply right-click the app and select Disable. After doing that, close the Task Manager window.
  1. Back to the System Configuration window, click Apply, then press the OK button.
  2. Finally, select Restart for the changes to take effect.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Support on Ko-Fi

Frequently Asked Questions

1. What is 100% disk usage in Windows 10?

A 100% disk usage means that your storage disk usage is maxed out. Hence, your computer’s performance will be degraded.

2. What is a third-party application in Windows 10?

A third-party application is an application that the PC manufacturer or operating system does not provide. These are applications that you download yourself.

Examples of third party applications in Windows 10 are web browsers such as Safari, Firefox, and Opera.

3. Does 100% disk usage slow down a computer?

Yes, 100% disk usage will cause your computer to slow down. Also, it will cause your computer to lag and sometimes it may become unresponsive.

Hence, your computer might not be able to perform some tasks effectively.

Also popular on Amazon
Patriot P210 256GB SATA 3 2.5 Inch SSD | Form factor: 2.5 Inch; Interface: SATA 3.
  • Capacity 256GB Latest SATA 3 Controller
  • Built in end-to-end data path protection, SmartECC technology, and Thermal throttling technology
  • SEQ Performance Read up to 500MB/s, Write up to 400MB/s
  • 4K Aligned Random Write: up to 30K IOPs
4. How can I check the disk usage of my Windows 10 computer?

To check the disk usage of your Windows 10 computer, follow the steps below.

a) Right-click the Start menu and select Task Manager.
b) After that, switch to the Performance tab. There, you will be able to find the disk usage of your computer.

To learn more about disks usage and how it works in Windows, read What Is Disk In Task Manager: Features, Pros & Cons.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
5. What is the full meaning of SSD?

The full meaning of SSD is Solid State Drive.

Conclusion

Having a 100% disk usage can make your Windows 10 computer lag seriously. However, with this guide, you don’t need to worry about that.

Specifically, this guide discussed various solutions to fix 100% disk usage in Windows 10. To give more details, I provided information on how to fix the issue by disabling notifications & actions.

Also popular on Amazon
Sale
PNY CS900 500GB 2.5" SATA III Internal SSD | Up to 550/500MB/s R/W - PC/Laptop/HDD Upgrade for Everyday Users, Creators, Gamers, and more - SSD7CS900-500-RB
  • Upgrade your laptop or desktop computer and feel the difference with super-fast OS boot times and application loads
  • Exceptional performance offering up to 550MB/s seq. Read and 500MB/s seq. Write speeds
  • Superior performance as compared to traditional hard drives (HDD)
  • Ultra-low power consumption
  • Backwards compatible with SATA II 3GB/sec

I also demonstrated how to solve the problem by running SFC and DISM scans. Not just that, we also discussed how to fix 100% disk usage in Windows 10 by performing a clean boot.

I hope you found this guide helpful. If you did, click on “Yes” beside the “Was this page helpful” question below.

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

You may also express your thoughts and opinions by using the “Leave a Comment” form at the bottom of this page.

Finally, for more Windows 10 fix-it guides, visit our Windows 10 Fix-it guides page.

Quick Recap

SaleBestseller No. 2
PNY CS900 250GB 2.5' SATA III Internal SSD | Up to 535/500MB/s R/W - PC/Laptop/HDD Upgrade for Everyday Users, Creators, Gamers, and more - SSD7CS900-250-RB
PNY CS900 250GB 2.5" SATA III Internal SSD | Up to 535/500MB/s R/W - PC/Laptop/HDD Upgrade for Everyday Users, Creators, Gamers, and more - SSD7CS900-250-RB
Exceptional performance offering up to 535MB/s seq. Read and 500MB/s seq. Write speeds; Superior performance as compared to traditional hard drives (HDD)
$49.80
Bestseller No. 3
Patriot P210 256GB SATA 3 2.5 Inch SSD | Form factor: 2.5 Inch; Interface: SATA 3.
Patriot P210 256GB SATA 3 2.5 Inch SSD | Form factor: 2.5 Inch; Interface: SATA 3.
Capacity 256GB Latest SATA 3 Controller; SEQ Performance Read up to 500MB/s, Write up to 400MB/s
$39.99
SaleBestseller No. 4
PNY CS900 500GB 2.5' SATA III Internal SSD | Up to 550/500MB/s R/W - PC/Laptop/HDD Upgrade for Everyday Users, Creators, Gamers, and more - SSD7CS900-500-RB
PNY CS900 500GB 2.5" SATA III Internal SSD | Up to 550/500MB/s R/W - PC/Laptop/HDD Upgrade for Everyday Users, Creators, Gamers, and more - SSD7CS900-500-RB
Exceptional performance offering up to 550MB/s seq. Read and 500MB/s seq. Write speeds; Superior performance as compared to traditional hard drives (HDD)
$79.99

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.