Fix DNS Probe Finished NXDOMAIN on Custom DNS Server
If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...
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Browse labFix Windows Defender Real-Time Protection Not Running
You open Windows Security and see a yellow warning: "Real-time protection is off." Or you...
Fix Cloudflare 521 Error Due to Server Overload
You see a Cloudflare 521 error page. The message says the web server is down. Often, this means y...
Windows Security App Not Working After Update: Fixes
After a Windows update, the Windows Security app may fail to open, show a blank window, or displa...
Fix Windows Defender Real-Time Protection Not Turning On After Update
After a Windows Update, you might find that Windows Defender's real-time protection is stuck ...
Fix NET::ERR_CERT_AUTHORITY_INVALID on Windows 10
You're browsing in Chrome or Edge and see NET::ERR_CERT_AUTHORITY_INVALID. T...