Windows Security Not Opening? Here's How to Fix It
You click the Windows Security icon in the taskbar or try to open it from Settings, but nothing h...
Software comparisons, alternatives, and tool decision notes.
Fit
Decision
Migration
Latest comparisons
Browse labChecklist for Fixing Command Prompt Startup Issues
If Command Prompt won't open, closes immediately, or shows an error on startup, the cause is ofte...
Windows Security Backup Configuration Guide
If you've opened Windows Security and found that your virus and threat protection settings aren't...
Fix Windows Search Error 0x80090016: Step-by-Step Guide
If you see error 0x80090016 when using Windows Search, it usually means the search index or a rel...
Fix Microsoft Teams Error 0x80070005
You try to sign in to Microsoft Teams and see error code 0x80070005. It usually means a permissio...
Fix Corrupt Task Scheduler Task Using schtasks Command
When a scheduled task in Windows Task Scheduler shows a status of "Corrupt" or fails to run with ...