Checklists for software errors, setup, and tool workflows.

Fix Windows Defender Invalid Configuration Error

You may see an error like “Invalid configuration” when opening Windows Defender or trying to run ...

Fix Windows Security Proxy 504 Gateway Timeout Configuration

When Windows Security (Windows Defender) reports a 504 Gateway Timeout error through a proxy, it ...

Fix Outlook High CPU Usage Caused by Antivirus Scanning

Symptoms and Likely Cause

You notice Outlook consuming 50% or more CPU, making your syste...

Fix Outlook Path Not Found Error When Opening PST File

When you try to open a PST file in Outlook and get a 'path not found' error, it usually means Out...

How to Fix Outlook Connection Refused Error

When Outlook shows a 'connection refused' error, it usually means the program can't reach the mai...

How to Fix Microsoft Teams 504 Gateway Timeout

If you're seeing a 504 Gateway Timeout error in Microsoft Teams, it usually means the server your...