100% DISK USAGE Windows 10 FIX 2021

1. Windows system  Update Windows 10.

2. Service Host: SysMain; Service Host: Storage Service; and similar  Disable Superfetch.

3. An unknown program you don’t remember downloading  Remove viruses and malware.

4. Your antivirus software  Reinstall or update your antivirus software.

5. A ton of apps running at the same time  Close background applications.

6. OneDrive, Dropbox, or another backup tool  Reset or reinstall synchronization tools.

7. Windows Search index  Rebuild the Windows Search index.

If Task Manager doesn’t provide a clear answer, try these other solutions to reduce your disk usage:

1. Repair hard disk issues

2. Delete malfunctioning page files

3. Delete temporary files

4. Update drivers

5. Update hard drive firmware