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

Fix Microsoft Teams Audio Not Working: Practical Steps

You join a Teams meeting but can't hear anyone, or your microphone isn't picking up your voice. T...

Windows Defender Troubleshooting Checklist

Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background, but s...

Fix PowerShell Access Denied for Get-ChildItem

When you run Get-ChildItem in PowerShell and see an access denied e...

MongoDB Authentication Failed: Administrator Checklist

How to Fix Windows Defender Proxy Error

If you see a proxy error in Windows Defender—often something like "Your IT administrator has limi...

Fix Windows Security Service Failed to Start Error 0x80070422

You see the error "Windows Security service failed to start" with code 0x80070422. This usually m...