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

Fix Windows Search 502 Bad Gateway Errors Caused by Firewall Blocks

You open Windows Search, type a query, and get a "502 Bad Gateway" error. This often means a fire...

How to Fix Cloudflare SSL Certificate Errors

If your site shows a Cloudflare SSL certificate error, visitors may see a warning or the connecti...

Outlook Token Expired When Sending Email: Fixes & Checks

You're composing an email in Outlook, hit Send, and get an error about an expired token. This usu...

Fix PowerShell 'Authentication Failed Permission Denied' Error

When PowerShell throws an "authentication failed" or "permission denied" error, it usually means ...

Fix 'Windows Security Authentication Failed' for Domain Credentials

Fix Windows Defender DNS Error on Windows 10

If you see a DNS error in Windows Defender on Windows 10, it usually means the app can't reach it...