Checklists for software errors, setup, and tool workflows.

Fix Gradle Build: Could Not Find or Load Main Class

When a Gradle build fails with Could not find or load main class, it usually means t...

Fix Outlook Blank Screen After Office Installation

Symptom and likely cause

After installing or updating Microsoft Office, Outlook may open ...

How to Fix Windows Activation Stuck on Sign-In Screen

If you're stuck at the Windows sign-in screen with an activation prompt that won't go away, you'r...

How to Fix PowerShell Rate Limit Error 429

If you're using PowerShell to call REST APIs — especially Microsoft Graph, Azure, or GitHub — you...

How to Fix Outlook Network Error Sending and Receiving Email

You try to send or receive email in Outlook and get a network error. The error may say something ...

Fixing Windows Defender Authentication Failed Permission Denied

You try to run a Windows Defender scan or update, but get an error like "Authentication f...