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How to Fix 100% Disk Usage on Windows 11. (Solved) – wintips.org

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If you see 100% disk usage in Windows 11 Task Manager, without running any heavy tasks, it means that something in the background is causing your disk to constantly work at high levels.

One of the most likely causes of slow performance in Windows 11 is high disk usage for no apparent reason that can reach 100%. This problem has been seen on both old and new computers, especially on computers that do not have an SSD drive. *

The reason why disk usage reaches 100% can be due to various reasons such as outdated drivers, malware, startup applications or processes running in the background, etc.

* Important: Windows 10 & Windows 11 need SSDs to run fast and smooth. Therefore, if you have a hard disk drive (HDD), replace it with an SSD and you will immediately fix the problem of high disk usage.

In this guide you’ll find several methods to solve the high disk usage problem in Windows 11.

How to fix: High Disk Usage (100%) in Windows 11.

To fix the ~100% disk usage on Windows 11, follow the below solutions in order:

  1. Run System File Checker and DISM.
  2. Check Disk.
  3. Scan for Viruses/Malware.
  4. Disable startup programs.
  5. Perform a clean boot.
  6. Increase virtual memory.
  7. Turn Off Sysmain & Windows Telemetry services.
  8. Disable Defrag Task
  9. Replace HDD with an SSD.

 

Method 1: Repair Windows 11 with System File Checker and DISM tools.

System file checker (SFC) and DISM are Windows command-line utilities for scanning and repairing missing or corrupted system files.

1. On the search bar type CMD and select Run as administrator

command prompt admin

 

2. In the cmd window, type the command below and press Enter.

  • Dism.exe /Online /Cleanup-Image /Restorehealth

3. Be patient until DISM repairs component store. When the operation is completed, (you should be informed that the component store corruption was repaired), give this command and press Enter:

DISM - SFC

4. This may take a few minutes to complete. Restart the PC once it is done and check if everything works fine now.

Method 2: Check Disk for problems

The second method to fix the high disk usage issue in Windows 11, is to check the hard disk for errors and to repair them, using the CHKDSK command. To do that:

1. Launch command prompt as administrator

2. In the command prompt, type the command below and press Enter.

3. You will get a prompt to schedule the disk check the next time the system restarts. Press Y (to select Yes) and restart your device to scan and repair the disk errors.

check disk

 

4. Upon restart let Windows to complete check and repair process and after entering Windows, open Task Manager and check if the 100$ disk usage issue persists.

 

Method 3: Scan Windows 11 for Malware.

If your Windows 11 device is still experiencing high disk usage problems after the above steps then it is advisable to check if it is infected with malware before proceeding further.

To scan and remove malware from your PC, I suggest to follow the instructions in this Malware Scan and Removal Guide, or to scan your computer with Windows Security.

To scan your PC with Windows Security:

1. On the search bar, type Windows security and click Open.

windows security

 

2. Once the Windows security widget opens, select Virus & threat protection.

image

 

3. Click Scan options.

windows security scan options

 

4. Click Full Scan to perform a comprehensive virus scan on the device and click Scan now.

windows security full scan

5. The device will scan for a few minutes to detect malware. If a threat or virus is detected, select Start Actions to remove or quarantine it. This could be the cause of high disk usage on your device.

 

Method 4: Disable Startup programs.

Some programs are configured to run immediately after Windows starts. These programs can cause disk usage to increase to abnormal levels, so go ahead and disable the startup programs to minimize disk usage.

1. Press Windows key + I to launch Settings.

2. Select Apps from the navigation pane, then click Startup.

Startup Apps Windows 11

 

3. Toggle Off as many startup programs that are not from Microsoft Corporation.*

* Note: In most cases, the 100% disk usage in Windows 11/10, is due to third-parties programs, not Microsoft’s. However, because sometimes both OneDrive and Microsoft Teams can cause the problem, go ahead and disable them as well.

Disable Startup Apps Windows 11

 

Method 5: Perform a clean boot.

Since some third-party services could be the reason why disk usage is skyrocketing, a clean boot of Windows 11 with ONLY Microsoft services is another good method to solve the problem.

1. Press the Windows + R keys on the keyboard to open the Run window.
2. In the Run box, type msconfig, then click OK.

image

 

3a. At Services tab, check to Hide all Microsoft services.
3b.
Select Disable all, then click OK.
3c. Click Restart when you are prompted to reboot the PC.

clean boot

4. Once the device has restarted, open task manager, and then check that disk usage has stabilized. If so, perform the same steps and turn on the disabled non-Microsoft services one by one to find out which one is causing the high CPU usage.

Method 6: Fix 100% Disk Usage in Windows 11 by Increasing Virtual Memory

When physical RAM on the PC is about to be exhausted, Windows uses part of the hard disk to support the memory. The allocated memory from the hard disk is called virtual memory. Increasing the virtual memory can fix high disk usage.

1. Press the Windows + R keys on the keyboard to open the Run window.
2. In the run box, type SystemPropertiesAdvanced and click OK.

clip_image022

 

2. Select the Advanced tab at Performance section, click Settings.

performance settings

 

3. In the Performance Options window, select the Advanced tab and in the Virtual memory section, click Change.

image

 

4. At Virtual Memory window:

a. Uncheck Automatically manage paging file size for all drives. (Make sure the drive where Windows is installed is selected. Usually, C:)

b. Select Custom size and adjust the initial and maximum size for the virtual memory as follows:

  • For the Initial size, enter the same value in the Recommended category below (e.g. “1650” in this example).
  • For the Maximum size, the value should be the size of the installed RAM in Megabytes multiplied by 1.5 *

* For instance: if your RAM is 8GB which is equivalent to 8192MB (8 x 1024), you need to multiply it by 1.5 to get the exact value to use for the maximum size. At this example: 8192MB * 1.5 = 12288 MB

c. Once the virtual memory values are entered, click Set and then OK.

Virtual Memory

 

5. After pressing OK you’ll get a prompt to restart the PC. Press OK to reboot.

 

Method 7: Stop/Disable SysMain & Telemetry Services

Sysmain (or “Superfetch”) is a Windows 11 service that supposedly improves system performance and helps applications open faster.

The Connected User Experiences and Telemetry service enables features that support in-application and connected user experiences, and sends diagnostic and usage information to Microsoft improve performance.

However, many users have reported that these services causes a lot of disk usage on their Windows 11 devices:

1. Press the Windows + R keys on the keyboard to open the Run window.
2. In the run box, type services.msc and click OK.

image

 

3a. Locate the SysMain service on the list of services, right-click and select Stop.

How to Fix 100% Disk Usage on Windows 11

 

3b. Once the Sysmain service has stopped, press Ctrl + Shift + Esc to start Task Manager and check if the disk usage has decreased. If yes, go to Services again, double-click on the SysMain service and set the Startup type to Disabled and you’re done! . If not, proceed to next step.

fix high disk usage windows 11

4a. Now stop the Connected User Experiences and Telemetry service.

Fix High Disk Usage on Windows 11

4b. Check in Task Manager if high disk usage has been stopped. If yes proceed and Disable the service, restart the PC and you’re done. If not, proceed to the next method.

image

Method 8. Disable Disk Defrag Task.

1. On the search bar, type Task Scheduler and click Open.

task scheduler

 

2. Go to Task Scheduler Library > Microsoft > Windows > Defrag.
3.
At the right pane, right-click on ScheduleDefrag task and select Disable.

disable schedule defrag

Method 9. Replace HDD with an SSD.

The final solution to fix the 100% disk usage problem on Windows 11, is to replace your hard drive (HDD) with an SSD.  Replacing your hard drive with an SSD is one of the best things you can do to dramatically improve the performance of your older computer.  To perform this task, follow the instructions on this tutorial: How to Move Windows to another drive.

 

That’s it! Which solution worked for you?
Let me know if this guide has helped you by leaving your comment about your experience. Please like and share this guide to help others.

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