Fix Windows Defender Not Starting After Update
After a Windows update, you might see that Windows Defender (now called Microsoft Defender Antivi...
Software comparisons, alternatives, and tool decision notes.
Fit
Decision
Migration
Latest comparisons
Browse labFix Windows Update Error 0x80070643 Installation Failed
You see error 0x80070643 when trying to install a Windows update, and the setup fails partway thr...
Fix Windows Security Failed to Start Due to Corrupted System Files
You open Windows Security and see the message: "Windows Security failed to start. Corrupted syste...
How to Fix Windows Login Loop by Adjusting Security Settings
If you're stuck in a Windows login loop—where you enter your password, the screen goes black or l...
How to Fix Windows Security Backup Not Working
Windows Security backup (part of Windows Backup or File History) may stop working for several rea...
Fix Chrome DNS_PROBE_FINISHED_NXDOMAIN After Network Change
If Chrome shows DNS_PROBE_FINISHED_NXDOMAIN right after you connected to a new W...