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Resolve 100% Disk Usage in Windows 11

What if you find your disk usage shows 100% after you have upgraded to Windows 11? Does it mean you need a larger HDD or SSD? In this article, we will tell you how to fix the problem.

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Updated by

Tracy King

Updated on Apr 22, 2024

If you have upgraded to Windows 11 and found that your computer responds slow, you can check in the Task Manager to see what causes the problem. Task Manager provides you with information on how is every process currently running on your computer. 

A common reason why your computer, or especially laptop, running slow is that the disk usage showing 100%. Generally, the disk usage would not go up for a long time. It will only reach a high level or close to 100% for a few moments, and then it should drop to a normal number, usually below 10%. If the disk usage of your computer continues at a high level. You need to find solutions to solve the issue. Here are 7 methods for you to try to optimize your computer.

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Fix 1. Update Your Device

Sometimes the disk usage is highly related to your computer's disk. If you have installed an old HDD on the computer, maybe it's time to change to a new one. One great option is to upgrade to a solid-state drive (SSD). SSDs are faster and more stable than HDDs. Computers installed with an SSD will have a better performance.

Fix 2. Reset Virtual Memory

If your computer's hard drive is not outdated yet, you could reset the virtual memory to fix the problem. Virtual memory is an extension of your computer's physical memory, which combines RAM and a part of the hard drive. When the RAM is out of space, Windows will store files in virtual memory. Here are the steps of how to reset virtual memory.

Step 1. Type Control Panel in the search bar, click the best match. 

Step 2. Find and click System, then choose Advanced system settings on the right panel.

Advanced system settings

Step 3. It will open a new System Properties window. Switch to the Advanced tab, click Settings.

System Properties-Advanced-Settings

Step 4. In the newly-opened windows, under the Advanced tab, choose Change to adjust the virtual memory.

change virtual memory

Step 5. Uncheck the Automatically manage paging file size for all drives option, then change the maximum size to a larger number. But don't set this value too high. It should be about 1.5 times the physical RAM.

set virtual memory

Step 6. Once set the virtual memory size, click Set and OK to confirm the change.

Step 7. Then you need to clear the computer's temp files. Press the Windows + R keys at the same time, type temp in the run box, and hit enter. 

Open temp files in run box

Step 8. It will list all the temp files on your computer. Select and delete all of them.

Delete all temp files

Step 9. You can now check if the disk usage is 100% or not.

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Fix 3. Change Power Options to High Performance

Some users said that change Power options to high performance will work. Here is how to do it.

Step 1. Go to Control Panel > Power & sleep > Click Additional power settings.

additional power settings

Step 2. Click Change plan settings > Change advanced power settings.

Changed advanced power settings

Step 3. Choose High performance from the drop-down menu and click Restore plan defaults.

choose high performance

Read Also: 100% Disk Usage Windows 10

Fix 4. Disable Antivirus Software temporarily

In some cases, the antivirus software will take too much disk usage. You can disable the software for a while to fix the issue.

Fix 5. Disable Windows Notifications

This is another method reported by users who experienced the same problem. 

Go to Settings > System > Notifications & actions, turn off the Get tips, tricks, and suggestions as you use Windows.

Disable windows notifications

Fix 6. Fix StorAHCI.sys Driver

Some AHCI PCIe (Advanced Host Controller Interface PCI-Express) can also cause the Windows 100 disk usage problem. You can fix the StorAHCI.sys driver to fix the problem.

Step 1. Open Device Manager and find the IDE ATA/ATAPI Controllers.

Step 2. Choose Standard SATA AHCI Controller.

Standard SATA AHCI Controllert

Step 3. Under the Driver tab, click Driver Details, check if there's a storahci.sys file.

storahci.sys file

Step 4. Close the Driver Details window and go to the Details tab, select Device Instance Path. Note the file that starts with VEN.

device instance path

Step 5. Type regedit in the search box of the Start panel, then hit Enter on your keyboard to run Registry Editor. Then go to: 

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\PCI\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties

The here refers to the name you see from step 4.

The differs on different machines.

registry editor

Step 6. Double click the MSISupported key and change the value to 0. 

change msisupported value

Fix 7. Perform a Disk Check

If none of the above methods can help you solve the problem, your last resort is to perform a disk check. You can run chkdsk in the Command Prompt to check and try to fix the problem.

But you should notice that the chkdsk command line could probably result in data loss. You should back up all the important data before checking disk.

You can also use EaseUS Partition Master to perform a disk check. Download this tool for free, and follow the guide to see how to check the file system with it.

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About the Author

Updated by Tracy King

Tracy became a member of the EaseUS content team in 2013. Being a technical writer for over 10 years, she is enthusiastic about sharing tips to assist readers in resolving complex issues in disk management, file transfer, PC & Mac performance optimization, etc., like an expert.

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