Knowledge base for software setup, errors, and daily tool work.

Fix DNS Probe Finished NXDOMAIN on Android Chrome

When you see DNS_PROBE_FINISHED_NXDOMAIN in Chrome on Android, it means the brow...

How to Enable Windows Security in Windows 11

If Windows Security isn't running or you see a message like "Your IT administrator has limited ac...

How to Fix Chrome Profile Login Loop and Gmail Sync Stuck

You sign into Chrome or Gmail, but the page keeps refreshing or the sync icon spins forever. This...

Fix Port Already Allocated Error When Windows Security Is Off

You try to start a local server or application and get an error saying the port is already alloca...

How to Fix Windows Activation Authentication Failed Error

You see "Authentication failed" when trying to activate Windows. This usually happens after a har...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

If you're dual-booting Windows and Ubuntu, or replacing Windows...