Windows Defender Service Not Starting: Fixes and Checks
When Windows Defender won't start, you might see an error like "Windows Defender service can't be...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Microsoft Store Not Opening After Update
After a Windows update, the Microsoft Store may fail to open—clicking the icon does nothing, or i...
Fix PowerShell Not Opening After Windows Update
After a Windows update, you might find that PowerShell won't open at all—no window appears, or it...
Fix Windows Update 404 Not Found Error: Practical Steps
When Windows Update returns a 404 Not Found error, it usually means the update server can't locat...
Setup Windows Update Configuration via Group Policy
When managing multiple Windows machines, configuring Windows Update settings individually is impr...
Fix Microsoft Teams Blank Screen by Clearing Cache
If Microsoft Teams opens to a blank white or gray screen, or gets stuck on the loading spinner, a...
Topic paths
Quick titles
Troubleshoot Windows Search Authentication IssueHow to Fix Update Error in Command Prompt on RebootMicrosoft Store Error 504: Quick Fix GuideFix High CPU Usage by Antivirus Scanning PowerShellChrome DNS Probe Finished NXDOMAIN FixHow to Recover from a Black Screen After Windows UpdateFix BitLocker Setup Error 0x80310059 on WindowsWindows Update 502 Bad Gateway Fix