How to fix 100% disk usage on Windows 11

How to Fix 100% Disk Usage on Window 11

The straightforward way to find the offending application or service that is causing 100% disk usage is to use Task Manager.

To open Task Manager, right-click on the Start menu and select Task Manager. Click the Disk column header to see what's taking up the most resources. From there, you'll have a good idea of ​​where to start.

However, the problem may be more serious than just closing the application or disabling the service.

Keep reading to find more potential causes of problems and how to fix them.

Disable Superfetch

Superfetch feature ( also known as SysMain in Windows 11) helps reduce startup time by accessing prefetched files and load applications more efficiently. While it's a useful feature that can improve performance, it can cause excessive disk usage.

To disable Superfetch (SysMain) on Windows 11, use the following steps:

1. Use the keyboard shortcut Windows key RStart "Run ”Dialog box.
2. In Run, type services.msc and click OK.
3. When the Services console opens, double-click SysMain and click the Stop button.
4. Next, click the drop-down menu next to Startup type and set it to Disabled.
5. Click Apply and OK and close the service console.

After stopping SysMain, you should notice a difference in disk usage in Task Manager, but you may need to restart your PC to make sure it's fixed.

Rebuild Search Index

Another common issue that causes high disk usage is the search index on Windows 11. Search indexing scans files, emails, photos, and other system files on your PC to help return search results faster. However, if something goes wrong, it can result in an indefinite search loop.

To fix it, you can rebuild the database. To rebuild the search index:

1. Click Start or press the Windows key, type Index Options, and then Select the top result.
2. When the "Index Options" window opens, click the "Advanced " button.
3. Click the Rebuild button in the Troubleshooting section and then click OK to verify.

This process may take a while, so you may need to take a break from your computer. The time required will vary based on the amount of data on the drive and its speed (i.e. SSD vs. HDD).

Disable Search Indexing Completely

If rebuilding is working fine but you find that you are doing a lot of rebuilding, you can disable search indexing completely.

To disable Windows Search, use the following steps:

1. Use the keyboard shortcut Windows key RLaunch the Run dialog box .
In Run, type
2. services.msc and click OK.
When the
3. Services console opens, double-click Windows Search.
When the
4. Windows Search Properties screen appears, set Startup type to Disabled.
Click
5. to stop, then click OK.

Search indexing is now no longer enabled and will not run again if you restart your PC.

Delete Temporary Files

Remaining temporary files may cause additional disk load, deleting these files can fix 100% disk usage on Windows 11.

To delete temporary files from Windows 11:

1. Use keyboard shortcutsWindows key RLaunch the Run dialog box.
2. In Run, type %temp% and click OK.
3. Temp Folder will open in File Explorer - Press Ctrl A to select everything in the folder, then click in the toolbar Delete button.

Disable DiagTrack Service

ConnectedUser Experience( DiagTrack ) Service (also known as TelemetryData) runs in the background and provides Microsoft with data about your PC usage. It can cause high disk usage.

To disable the DiagTrack service, use the following steps:

1. Press Ctrl Shift Esc to launch Task Manager and open "Services " Tab.
2. Right-click DiagTrack and select Stop from the menu.
3. Next, click the Open Services link at the bottom of Task Manager.
4. When the Services window appears, double-click the Connected User Experience and Telemetry service.
5. Under the General tab, set Startup type to Disabled and click Apply.
6. Now, click on the Recovery tab, set all three failure options to Take No Action and click on OK.

The service is now disabled and you don’t need to worry about it running again when you restart your PC.

Check for Malware

Another important and perhaps first thing to check for is viruses or other malware. Windows Security (formerly Windows Defender) is built-in and scans your system for malware in real time. However, it may not capture everything.

You can run a virus scan manually using the following steps:

1. Click Startor press the Windows key and type windows security and select the top result.
2. Select Virus and Threat Protection on the left, and then click the Quick Scan button.
3. If nothing is detected and you are still getting 100% disk usage, try a deeper scan. To do this, click the Scan Options link and select Full Scan or Microsoft Defender Offline Scan.

Deeper scans take longer to complete, but are worth the wait if your system is infected with stubborn malware. Offline scanning requires a restart, so be sure to close any open files before starting.

Also, it’s important to get a second opinion. For example, if you're unsure about any file you're opening, run a scan with a trusted and free security application like Avast or AVG AntiVirus.

Run SFC and DISM scans

Missing or corrupted files on Windows can cause high disk load as your PC tries to compensate. Fortunately, Windows has several built-in tools that can help you scan for bad files and replace them with good ones.

To run these tools:

1. Right-click the Start button and select Windows Terminal (Admin) from the menu .
2. Enter the following command in the terminal and press Enter:

   DISM /Online /Cleanup-Image /RestoreHealth

   

3. Once the DISM command is completed, run the following command, ThenPress Enter:

   sfc /scannow

   

Check your hard drive for errors

Fix 100% Disk Usage on Windows 11 Another thing is to check the disk for errors.

You can check the disk for errors using the following steps:

1. 打开 开始菜单并输入powershell。
2. 将鼠标悬停在顶部结果上，然后选择Run as Administrator。
   
3. 终端打开后，运行以下命令并按 Enter。

   Chkdsk /r /f

4. 下次重新启动 PC 时，系统会提示您安排扫描 - 键入Y并按Enter。

Windows 11 上更好的磁盘使用率

如果您在 Windows 11 上看到 100% 的磁盘使用率，则上述选项之一应该可以解决问题。如果您尚未使用 Windows 11，则可以在 Windows 10 上解决问题。

Windows 11 为您的驱动器提供了其他内置工具，例如清理建议。您还可以配置Storage Sense 功能以确保您的驱动器以最佳方式运行。

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