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

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...

Fix Chrome Not Opening After Windows 10 Update

After a Windows 10 update, Chrome might fail to open—clicking the icon does nothing, or it crashe...

OneDrive Sync File Locked: Step-by-Step Checklist

If you see "file locked" or "file in use" in OneDrive, it means another process or user has the f...

Fix Windows Defender Missing After Update

After a Windows update, some users find that Windows Defender is missing from the system tray, Se...

Fix Windows Update Connection Refused After Network Reset

After resetting your network settings in Windows, you may see a "Connection refused" error when t...