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 listHow to Fix Windows Security Slow Startup & Disable It
If your Windows PC takes forever to boot and you suspect Windows Security (formerly Defender) is ...
Fix Remote Desktop Error 0x204 After Windows Update
If you see error 0x204 when trying to connect to a remote desktop after a Windows update, the con...
Fix Chrome File Locked by Background Process Error
You try to delete or move a file, and Windows tells you it's locked by a Chrome background proces...
Fix Microsoft Teams Not Opening After Update
After a recent update, Microsoft Teams may fail to open—stuck on a loading screen, crash instantl...
Fix Chrome 'Profile Error Invalid Configuration' on Windows 10
When you see “Your profile could not be opened correctly” or “Profile Error: Invalid Configuratio...
Topic paths
Quick titles
Fix Remote Desktop Blank Screen and Disconnect IssuesMicrosoft Store Won't Open: Quick Fix ChecklistHow to Speed Up Command Prompt Interfered by AntivirusHow to Stop Windows Defender from Re-enablingTask Scheduler 'Run Whether User Is Logged On' FixFix Task Scheduler Module Not Found Configuration ErrorMac Chrome Sync Troubleshooting: Common FixesRestore Windows Search After Sleep Mode