Windows 11 · Windows
Fix 100% CPU usage in Windows 11
Source-checked About 10 minutes
Answer
Use Task Manager to identify the process consuming CPU, update or remove the responsible app, scan for malware, and test a clean boot if the cause is unclear.
Check the process using CPU time before changing anything
Identify the exact device, app, account, error, and affected feature for the process using CPU time. Keep the current result visible or record it first, so the page's later actions can be tested against one clear starting point.
Use the supported controls for the process using CPU time
Follow the specific control path in the next steps and change only the setting or component that matches the observed problem. Do not combine resets, driver changes, account changes, or third-party tools before checking the documented route.
Identify the process
Press Ctrl + Shift + Esc, sort Processes by CPU, and record which process remains high for several minutes.
Close or update the cause
Save work, close the affected app, and install its current update. Do not end unfamiliar Windows system processes.
Check startup and security
Disable unnecessary Startup apps and run a Windows Security scan.
Isolate persistent usage
Install Windows updates and use a clean boot to identify third-party services. Escalate sustained system-process usage with the process name and logs.
Verify the result for the process using CPU time
The same workload remains responsive and the identified process no longer holds abnormal CPU after the supported change. Repeat the original task once after reopening the relevant app or settings page, so a temporary screen refresh is not mistaken for a completed result.
Narrow down problems with the process using CPU time
If CPU stays high while idle, the leading process changes constantly, heat causes throttling, or a system process cannot be safely ended, stop broad resets and return to the last known state. Capture the exact error, versions, hardware or account scope, and failed step before using the linked official support channel.
Video walkthrough
If it does not work
- If the process using CPU time is unchanged after the documented check, return to the first observed condition and identify whether it affects one app, account, device, or every task before repeating steps.
- If the labels differ after an update or the device is managed, retain the exact condition and use the linked owner source before removing data, resetting Windows, or installing an unrelated tool.
Sources and verification
Checked against official documentation on . Scope: Windows.
Follow the linked first-party guidance if labels differ after a platform or app update.