An svchost.exe sits at 100% and I do not know which service
Since Windows 10 1703 each service runs in its own svchost instance. Yet sometimes it is still one host with multiple services.
Try this first
- 1Open Task Manager, Details tab, right-click svchost and choose Go to Services
- 2Or run tasklist /svc and map PID to service name
- 3Use Process Explorer for a visual tree per host
- 4Stop the suspect service temporarily to see if load drops
When to bring us in
For stubborn high load: use xperf or Windows Performance Recorder for a trace.
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.
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