This page is a collection of troubleshooting techniques to solve the issue where Windows 10 is using 100% disk usage.

Feel free to add other or additional troubleshooting steps.

This Wiki page is derived from an initial question on the Windows 10 Hardware & Performance forum.

Root Causes

1. Type of disk

See: Task Manager might show 100% disk utilization on Windows 10 devices with Message Signaled Interrupt (MSI) mode enabled

https://support.microsoft.com/en-us/kb/3083595

2. Window 10 Tips

Check settings, system, notifications, and turning off "show me tips about Windows."

https://www.reddit.com/r/techsupport/comments/3h4wjg/windows_10_high_disk_usage_100_ive_seen_a_thread/

3. Windows Search & Prefetch

http://www.tomshardware.co.uk/forum/id-2813275/disk-usage-100.html

and

http://www.makeuseof.com/tag/4-tips-fix-100-disk-usage-improve-windows-performance/

4. Google Chrome & Skype

http://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/how-to-fix-100-disk-usage-in-windows-10/7c5c979b-0ed0-4855-b9b8-05b9499533e2?auth=1