How to Fix Windows Defender Service Not Running
If you see a message that Windows Defender is not running or the security center shows it's off, ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
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View listWindows Update Authentication Failed: Complete Troubleshooting Checklist
When Windows Update fails with an authentication error, it usually means the system couldn't veri...
Fix Windows Update Authentication Failed Due to Group Policy
You try to run Windows Update and get an error like "Authentication failed" or "0x80070005" – and...
Fix Windows Defender DNS Error 0x800704cf
You open Windows Defender and see error code 0x800704cf. This usually means Windows Defender can’...
Fix Remote Desktop Port Already Allocated Error 0x80004005
When you try to start a Remote Desktop session and see error code 0x80004005 with a message that ...
How to Fix Microsoft Store Not Opening
When you click the Microsoft Store icon and nothing happens—or it flashes and closes—it's usually...
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