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

Windows Defender Troubleshooting Guide for IT Admins

Windows Defender (Microsoft Defender Antivirus) is the default endpoint protection in Windows 10 ...

Microsoft Teams Microphone Not Working in Meetings: Fixes

When your microphone stops working in a Teams meeting, you can see others but they can't hear you...

Fix Certbot Renew Certificate Not Working

You run certbot renew and nothing happens, or you get an error. Renewal failures oft...

Windows Update 502 Bad Gateway: Step-by-Step Fix

When you run Windows Update and see a 502 Bad Gateway error, it usually means th...

Fix Windows Security File Locked Error 0x80070020

You try to move, delete, or rename a file, and Windows shows error 0x80070020: "The file is locke...

Fix 'PowerShell Not Recognized as Internal or External Command'