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

Fix Windows Activation 502 Bad Gateway Due to Proxy Settings

If you see a "502 Bad Gateway" error when trying to activate Windows, the problem is often a misc...

Fix PuTTY Connection Refused After Server Restart

You restart your server, open PuTTY, and see "Connection refused". This is a com...

Command Prompt Setup Guide for Beginners

What is Command Prompt?

Command Prompt is a text-based interface in Windows that lets you...

How to Fix Task Scheduler Not Triggering on Time

If your scheduled tasks run late or not at all, the problem often comes from power settings, user...

How to Fix Windows Defender Blank Screen Issue

If you open Windows Defender (now called Windows Security) and see only a blank white or black sc...

Fix Windows Search SSL Certificate Error via Registry

If you see an SSL certificate error when using Windows Search (e.g., searching in Outlook or File...