Fix Windows Defender Service Authentication Failed Error
You might see the error 'Windows Defender service authentication failed' when trying to open Wind...
Software comparisons, alternatives, and tool decision notes.
Fit
Decision
Migration
Latest comparisons
Browse labFix a Corrupted Windows Update Configuration
If Windows Update fails with errors like 0x80070002, 0x80073712, or simply hangs, the update conf...
How to Identify a Chrome Extension Causing Browser Crashes
If Chrome keeps crashing, freezing, or showing the 'Aw, Snap!' error page, a misbehaving extensio...
Microsoft Store Sync Issues Between Devices: Fixes That Work
You buy an app on one Windows PC, but it doesn't show up on another. Or your game saves, settings...
Fix 'Run Command Prompt as Administrator' Permission Denied Errors
You right-click Command Prompt, select 'Run as administrator', and get an 'Access denied' or 'Per...
Fix Windows Defender Authentication Error from Corrupted System Files
You open Windows Defender and see an authentication failed error. This often happens after a fail...