Windows Defender Not Opening? Here's How to Fix It
You click the Windows Defender icon, but nothing happens—or you get an error saying the app didn'...
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View listWindows Security DNS Error Troubleshooting Checklist
If you see a DNS error in Windows Security—like 'DNS resolution failed' or 'We can't connect to t...
Fix Windows Defender Service Not Starting (Error 0x80070422)
You try to start Windows Defender but get error 0x80070422: “The service cannot be started, eithe...
Fix Windows Defender Error 0x80073b01
If you see error code 0x80073b01 when opening Windows Defender or trying to run a scan, it usuall...
How to Fix Task Scheduler Token Expired Error
When a scheduled task fails with a 'token expired' error, it usually means the task cannot authen...
Fix Outlook Add-In Conflict That Prevents Startup
You launch Outlook and it crashes or hangs before the main window appears. A common cause is a co...
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