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

Fix 'Token Expired' in Microsoft Teams Without Reinstalling

You're in a meeting, or trying to sign in, and Microsoft Teams says your token has expired. The k...

Windows Defender Missing from Settings After Update: Fix

After a Windows update, you might open Settings and find that Windows Defender (now called Micros...

How to Fix Windows Update Error 0x80070643

You try to install the latest Windows updates but get error 0x80070643. This usually means the up...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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

Fix Microsoft Store Ubuntu Snap Not Working

You installed Ubuntu from the Microsoft Store, but the snap command isn't working. This usually a...

Fix Windows Defender DNS Error Not Working

You open Windows Security and see a warning that Windows Defender isn't working, often accompanie...