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

Windows Defender 404 Not Found: How to Fix Missing Interface

You open Windows Security, click on Virus & threat protection, and get a blank page or a 404 erro...

Fixing Microsoft Teams Rate Limit Error When Sending Messages

How to Fix PowerShell Blank Screen on Startup

When PowerShell opens to a blank screen with no prompt or output, the shell is usually loading a ...

Fix 502 Bad Gateway After Reboot in Command Prompt

If you see a 502 Bad Gateway error after rebooting your server or workstation, i...

Fix Microsoft Teams SSL Certificate Error on Windows 10

You open Microsoft Teams on Windows 10 and see an error about an SSL certificate. The app may fai...

How to Fix Windows Defender Service Unavailable in Windows 10

If you see 'Windows Defender service unavailable' in Windows 10, the antivirus may be disabled or...