Fix Windows Defender Not Starting After Update
After a Windows update, you might see that Windows Defender (now called Microsoft Defender Antivi...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listSetup Windows Security to Fix 502 Bad Gateway Error
If you're seeing a 502 Bad Gateway error while running a local web server on Windows, the problem...
How to Unlock a File in Use by Another Program in Windows
You try to delete, rename, or move a file in Windows and get an error: "The action can't be compl...
How to Enable Windows Defender Service Manually
If Windows Defender won't start or you see warnings that it's turned off, the underlying service ...
Fix Windows Defender Version Mismatch with Configuration Tool
You might see a version mismatch warning when opening Windows Defender Security Center or running...
How to Fix Microsoft Teams Connection Timeout Errors
You're in the middle of a call or trying to send a message, and Teams shows a connection timeout ...
Topic paths
Quick titles
Fix Chrome 'Access Denied' Error on Android: Step-by-Step GuideWindows Security Blocking File Access? Here's How to FixChrome Stuck on Loading After Update – Fix GuideHow to Reset Windows Defender CacheFix Windows Update Components Not WorkingPowerShell Authentication Failed: Password Expired FixInstall npm Using Command Prompt on WindowsChrome Service Unavailable After Update Fix