A Guide to Fix 100% Disk Usage in Windows 10


Windows 10 users have been complaining that their computer is showing 100% disk usage. When a computer reaches full disk capacity, it loses its ability to launch new applications. It becomes slow, almost impossible to use.

Mostly it’s not the user’s fault; the computer can reach full disk capacity all by itself. But it is certain that some issues are making your hard drive overworking. If you’re also dealing with the 100% disk usage problem, then don’t worry. We will show you some quick solutions that you can use to resolve the issue on your Windows 10 computer.

A Guide to Fix 100% Disk Usage in Windows 10

Solutions to Solve the 100% Disk Usage issue in Windows 10:

Here are a few solutions that will help you resolve the 100% disk usage problem in Windows 10. Go through them one by one and see which one works for your PC.


Solution 1: Disable Superfetch and Prefetch services:

Superfetch and Prefetch are services that improve the system performance by predicting which applications the user is going to open and preloading the frequently used program data into memory. Both of these two services are useful, but they are known to cause high disk usage. So, to fix the 100% disk usage issue, you need to disable Superfetch and Prefetch from your computer.

Follow the steps given below to disable SuperFetch:

  • In the Search bar, type “services.msc”.
  • Open the Services tab.
  • Locate the Superfetch service and then right-click on it.service tab
  • Click on Properties.
  • Now, choose the Disable button and press OK.
  • Then, you have to reboot your computer and see if the problem is solved.

If the issue continues, follow the next steps to disable the Prefetch service.

  • In the Search bar, type “regedit.”
  • Once the Registry Editor opens up, go to the following path.

HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Session Manager/Memory Managemen/PrefetchParameters

  • Locate the EnablePrefetch option and double-click on it.
  • You can configure EnablePrefetch by entering the following values into Value Data box:

0 – Disables Prefetch

1 – Enables Prefetch for Applications only


2 – Enables Prefetch for Boot files only

3 – Enables Prefetch for Boot and Application files

  • You’ll find the default value is 3. To disable Prefetch, set the value to 0.
  • Restart your PC, and check if the disk usage has reduced or not.

Solution 2: Run the CHKDSK scan:

You should also check if everything is alright with your hard disk. There is a built-in utility in your Windows 10 computer known as the CHKDSK scan utility that will check the health of your computer’s hard disk. Follow the steps given below and learn how to perform a CHKDSK scan.

  • Press Windows key +X.
  • Select the Command Prompt (Admin) option.
  • When the UAC (User Account Control) prompt asks for permission, click “Yes.”
  • In the command prompt window, type the following command line and press Enter.

chkdsk.exe /f /rcommand Prompt

  • Then, type “Y” to ensure the disk check procedure should begin when the next time you restart your computer.

Note: Remember to close all of your applications first.

  • The next time you boot your computer, the disk check procedure will begin on its own. You can also reschedule it by following the steps from the beginning.
  • After you complete the disk check, go to your Task Manager by typing “task manager” in the Windows search bar.
  • In the Processes tab, you can see the disk usage % at the top of the Disk column.Task Manager
  • If it doesn’t show 100%, then you have solved the problem. If it continues to show 100% disk usage, go to the next solution.

Solution 3: Disable Windows Search:

Another way to reduce your disk usage is by disabling Windows Search. First, temporarily turn off the Windows Search and see if it can fix the 100% disk usage issue. Follow the steps given below.

  • Open the Command Prompt window with administrative privileges.
  • Type the following command line and press Enter.

net.exe stop Windows searchCommand Prompt

  • After the process is complete, open Task Manager and checks if the disk usage is still showing 100%.Task Manager

If you become successful in resolving the disk usage issue, then you can follow the steps given below and disable Windows Search permanently.

  • In the Search bar, type “services.msc
  • Open the Services tab.
  • Locate Windows Search service and right-click on it.service tab
  • Choose the Properties option from the drop-down menu.
  • Then, go to the General tab.
  • Click on Startup type and set it to Disabled.
  • Click “Apply,” and you have successfully disabled Windows Search.

If the solution didn’t come to your use, try the next one.

Solution 4: Perform a Disk Cleanup procedure:

If you have too many temporary files, they can clog your computer and increase disk usage. So, to reduce disk usage, you can use the Disk Cleanup utility.

  • In the Search bar, type Disk Cleanup.disk cleanup
  • Double-click on the first search result and launch the Disk Cleanup tool.
  • Now, you have to select the disk that you want to clean.
  • Your computer will also show you more information on the spaces you can free up.
  • Start the process by clicking on the Clean up system files option.
  • After the process is complete, launch your Task Manager and see if the issue is solved.

Also Read: How Safe it is to Delete Everything in Windows Disk Cleanup?

Solution 5: Update your Windows:

Sometimes users forget to update their windows, and that can lead to a lot of issues. Updating your Windows fixes bugs that were present in the previous version. It can also reduce the high disk usage problem. So, if you haven’t tried updating your Windows yet, follow our steps and get it done. thoptv pc

  • Open the Settings tab.
  • Go to Update & Security.
  • Choose the Windows Update option and click on the Check for updates button.
  • After the updates are installed on your computer, check if the 100% disk usage issue is still present on the Task Manager.

Solution 6: Reset the Virtual Memory on your Computer:

Virtual memory is a combination of RAM and a part of your hard drive. When the RAM of your computer isn’t enough for performing a task, your operating system will temporarily save the files in virtual memory. And then retrieve them back to RAM when required. In short, virtual memory is an extension of your computer’s physical memory.

So, by controlling or resetting your virtual memory size, you can reduce disk usage. Here’s a quick guide for you on how to reset virtual memory on your computer.

  • Press Windows key + Pause/ Break key.
  • On the left panel, click on the Advanced System Settings.
  • Then, choose the Advanced tab and select the Settings option.
  • Again come to the Advanced tab, click on the Virtual memory option, and select Change.
  • Uncheck the box besides the Automatically manage paging file size for all drives option.
  • Now, you have to select the drive where your Windows is installed (usually it is “C:” )
  • Then, enter an Initial size and Maximum size for your virtual memory:
    • Initial size: It depends on your computer. If you don’t know what value to use, enter the value from the Recommended category.
    • Maximum size: You should use a value that is 1.5 times the size of your physical RAM.
  • After you have put the values, choose Set, then click OK.
  • Now, you can open the Task Manager and check the disk usage.

If the disk usage is still at 100, try the next solution.

Solution 7: Perform a Clean boot procedure:

Clean booting your device will decrease the number of programs running on your computer. In this scenario, your computer will boot with a minimum set of drivers and programs that are necessary to run it properly. Through this process, you can solve the 100% disk usage issue. Follow the steps given below.

  • Go to the Start menu
  • Type “MSConfig” and press Enter.System Configuration
  • Open the System Configuration tab and choose the Services option.System Configuration
  • Then, you have to check the Hide all Microsoft services check box.
  • Click on the Disable all option.
  • Now, go to the Startup tab and launch Task Manager.
  • Choose each startup item, select the Disable button.
  • Then, close the Task Manager window, restart your computer and check the disk usage.

 If your computer uses 100% of its disk usage, it will become slow, all the functions will start getting affected. So, if you want to run your computer smoothly again, you need to reduce disk usage as soon as possible.

We have provided you with some effective solutions to fight this problem. The steps are easy, and you can perform them without any professional help. Use our solutions to solve the 100% disk usage issue, and let your computer run as well as never before. If you have any queries or feedback, please write down the comment in the below comment box.


  1. Something is definitely missing..
    (a) Resolve PCI-Express Firmware Bug :- you have not indicated what to do with the copied text about the driver properties.
    (b) Disable Diagnostic Tracking in windows 10 :- the cmd command (sc config “DiagTrack” start= disab sc stop “DiagTrack”) when applied it throws error

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