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

Fix 'Windows Defender Firewall Has Blocked' Error

You see a notification that Windows Defender Firewall has blocked an app or feature. This usually...

Fix Outlook Blank Screen After Office Installation

Symptom and likely cause

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

Git Repository Not Found: Practical Troubleshooting Checklist

When you try to clone, push, or pull a Git repository and see "repository not found", it's usuall...

Windows Defender Troubleshooting Checklist for Common Errors

Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background. But w...

How to Fix Microsoft Teams 404 Not Found Error

When Microsoft Teams shows a 404 Not Found error, it usually means the app can't reach the server...

Windows Activation Troubleshooting Checklist: Step by Step

Windows activation errors can appear suddenly—often after a hardware change, update, or network d...