Fix Windows Defender Proxy Error: Permission Denied - BitLocker Key Rejected: Troubleshooting Guide-How to Fix 'Clear Windows Security Cache Permission Denied'
Before changing system settings, save your work and note the exact error text so you can compare results after each step.
Extra verification checklist
- Restart the affected app after changing permissions or configuration files.
- Test the same workflow in a clean browser profile or a temporary user account.
- Compare the result on another network if the error may be connection related.
Related Software Guides
How to Fix npm ERR! code ERESOLVE in React Projects
Microsoft Teams Mic Not Working After Update: Fixes
Fix Windows Security DNS Error Permission Denied
Fixing npm Dependency Conflicts from Duplicate Packages
How to Fix Windows Security Missing from Taskbar
How to Fix Windows Update Connection Refused by Antivirus