If your Windows PC is stuck at 100% disk usage, it can really slow down your PC.

So slow that even performing basic tasks such as opening or closing an app can leave you frustrated.

So, let’s explore how to fix high disk usage on Windows.

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The below steps involve making modifications to Windows Registry.

We highly recommend youcreate a restore point in Windowsbefore proceeding with the steps below.

It is designed to preload apps you frequently use to RAM to improve the system performance.

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However, SysMain is often also associated with causing high disk usage in Windows computers.

Unfortunately, the service is also known to cause high disk usage problems in Windows 11.

Clean Up Startup Apps

Startup apps are the apps that start automatically when your setup boots.

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While a handy feature, too many of them can slow down your PC.

Additionally, some of these may also cause a 100% disk usage issue.

If not, enable all the startup apps one by one till you find the conflicting app.

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Uninstall the app to see if that helps you eliminate the 100 percent disk usage problem in Windows 11.

Rebuild Search Index

The Windows search indexing helps you find files and email messages faster.

To fix the problem, you could rebuild the search index.

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This will recreate the database and resolve any issues with the index.

To rebuild the Windows search index:

The index rebuilding process may take some time to complete.

So wait for the process to complete and then check for any improvements.

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Note that doing so will affect Windows search functionality on your PC.

To shut down the Windows Search service:

7.

Turn Off Hibernation

Hibernation helps your system boot faster after a restart.

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To turn off hibernation in Windows 11:

8.

Run a Malware Scan

If the issue persists, check your setup for malware infection.

Here’s how to do it.

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A full scan takes longer than a quick scan.

However, it should find any hidden malicious files and clean them for good.

While Windows Security offers excellent protection, take a second opinion withthird-party antivirus for Windows 11.

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