Fix Windows Security High Memory Usage
If you notice that Windows Security (formerly Windows Defender) is using a lot of memory—sometime...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
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View listWindows Defender Access Denied Troubleshooting Checklist
You try to open Windows Defender or run a scan and get an "Access Denied" message. This usually m...
How to Fix Microsoft Store App Update Permission Denied Error
When you try to update an app from the Microsoft Store and see a "permission denied" or "access d...
Fix Windows Security High Memory Usage (100%)
You open Task Manager and see Windows Security (or Antimalware Service Executable) using nearly 1...
Fix Windows Defender Token Expired in Safe Mode
If you see a 'token expired' message when trying to run Windows Defender in Safe Mode, it usually...
How to Fix Windows Security DNS Error 0x800704cf
You might see error 0x800704cf when opening Windows Security or trying to update Windows Defender...
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