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

How to Fix Windows Security Certificate Error Not Trusted

You're browsing or running an app and Windows throws a security warning: the certificate is not t...

Checklist for Troubleshooting Windows Defender Configuration Issues

Windows Defender (now Microsoft Defender Antivirus) sometimes fails to apply settings or behaves ...

Fix Windows Update Error 0x80070002 Permission Denied

If you see error 0x80070002 with a "permission denied" message when running Windows Update, it us...

MongoDB Authentication Failed After Upgrade: Fixes That Work

After upgrading MongoDB, you might see "Authentication failed" even though credentials haven't ch...

Fix Windows Defender Service Unavailable Error

You open Windows Security and see the message 'Windows Defender service unavailable' or 'Windows ...

BitLocker Encryption Causing High Memory Usage? Here's How to Fix It