Fix 'Security Module Not Found' in Windows Defender
If you see a message in Windows Security that says something like "Security module not found" or ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Outlook Path Not Found Error When Opening PST File
When you try to open a PST file in Outlook and get a 'path not found' error, it usually means Out...
Windows Security Not Scanning for Viruses: How to Fix
If Windows Security (formerly Windows Defender) is not scanning for viruses, you may see an error...
How to Fix Windows Defender Not Opening
When you click Windows Defender and nothing happens, or it opens and immediately closes, it's oft...
How to Fix '404 Not Found' File Path Errors in CMD
When you run a command in the Windows Command Prompt and see '404 Not Found' or
Fix Microsoft Teams Invalid Configuration Settings Error
When Microsoft Teams displays an 'invalid configuration settings' error, it usually means the app...
Topic paths
Quick titles
How to Fix RDP SSL Certificate Mismatch ErrorsFix SharePoint Search Not Showing in WindowsChrome Extension Not Working After Update: FixesFix Microsoft Store Apps Not Downloading or UpdatingFix Windows Update Stuck on CheckingLaravel Artisan Not Found? Step-by-Step ChecklistCurl Command to Diagnose 504 Gateway TimeoutFix Windows Search SSL Certificate Error Configuration