Windows 10 Defender runs high CPU when logged in and doesn't stop until logged out.

  • Thread starter Thread starter Terry Ron Vantreese
  • Start date Start date
T

Terry Ron Vantreese

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I've never heard of this issue, so I can only tell you what's not true about this issue.


1. None of the non-Microsoft services is causing this issue. I know because I shut them all down.

2. Steps to repeat: 1) Login. (Just one step.)

3. Performed a full scan.

4. Cleared the schedule (actually it was already cleared).

5. Excluded scanning itself both in their Program Files folder, ProgramData folder, and the process MsMpEng.exe

6. I ran the sfc /scannow.

7. I rolled back using the system restore. I thought it resolved, but the issue came back.

8. I upgraded to 20H2.

9. I upgraded all optionals.

10. I'm unable to adjust the affinity or priority (because it's protecting itself).

11. I am Administrator.

12. Nobody on the internet mentioned this issue, although many have similar issues.

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