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

Certbot Renewal Failed Due to Nginx Configuration: How to Fix

Fix Windows Defender Real-Time Protection Stuck on Scanning

If Windows Defender's real-time protection appears stuck on 'Scanning' and never completes, it ca...

How to Fix PostgreSQL Password Authentication Failed for User

You see psql: error: FATAL: password authentication failed for user "youruser" when ...

How to Fix Windows Security Keeps Crashing

If Windows Security (formerly Windows Defender) keeps closing unexpectedly, you may see error mes...

Reduce Windows Search Memory Usage: Practical Settings

If Windows Search is using 200-500 MB or more of RAM on your system, especially on a machine with...

Fix Windows Defender Not Starting Due to Antivirus Conflict

You open Windows Security and see a message that Defender is turned off or not starting. The most...