RuntimeBroker.exe burns CPU for no clear reason
RuntimeBroker brokers permissions for modern apps. A single bad UWP app or widget can drive it crazy.
support/performance/runtime-broker-cpusteps: 4
Try this first
- Open Task Manager and sort by CPU, identify which broker instance
- Check which apps recently launched or which widgets are active
- Turn off background apps you do not use in Privacy settings
- Update or remove the offending app, often a news-feed widget
When to bring us in
For persistent high CPU after cleanup: run DISM/SFC, OS files may be corrupt.
See also
- My laptop is suddenly slowThree main suspects: a runaway background process, near-full disk, or a Windows update in progress.
- One specific application is slow for everyoneIf an app is slow for one person: local. For everyone at once: server side or vendor side.
- Opening files from the file server takes minutesOften the server itself is fine and the issue is network routing or stalling DNS resolution.
None of the above fits?
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