How to Fix Windows Defender Blocked by Group Policy
When you try to open Windows Defender and see a message like "This app is blocked by group policy...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Security Backup Permission Denied Error
When you try to back up files using Windows Security (Windows Defender) or the built-in backup to...
Fix Outlook Blank Screen Caused by Add-In Conflicts
You open Outlook and see only a blank white or gray screen. The ribbon might be missing, or the i...
Fix VirtualBox Kernel Driver Not Installed on Windows 10
When you try to start a virtual machine in VirtualBox on Windows 10, you might see the error:
How to Fix a Stuck Command Prompt Update
You start a Windows update and the progress bar stalls at a certain percentage, or the command pr...
How to Fix Windows Security Not Working
Windows Security (formerly Windows Defender) may fail to open, show a blank page, or refuse to up...
Topic paths
Quick titles
How to Resolve Windows Update Module Not FoundWindows Search 404 Error Due to Permissions – FixFix Windows Update Error 0x80070005 Access DeniedDocker Desktop Stuck on Starting WSL2 FixOutlook Module Missing TroubleshootingFix Windows Search Not Finding Files on External DriveFix Windows Search Not Working (Error 404) – Practical GuideWindows Terminal Cache and Settings Reset Guide