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

Fix Remote Desktop Black Screen After Login on Windows

You log into a remote Windows machine via RDP, see the login screen, enter your credentials, and ...

Fix Windows Activation 502 Bad Gateway Firewall Issues

When you try to activate Windows and see a 502 Bad Gateway error, it often point...

Check If Your Windows License Is Retail or OEM

If you're troubleshooting activation issues or planning to transfer Windows to a new computer, kn...

BitLocker Recovery Key Not Accepted: 504 Error Fix

You enter your BitLocker recovery key, but get a 504 error. The key is not accepted. This usually...

Fix Outlook Cannot Connect to SMTP Server Error

You try to send an email in Outlook, but it fails with a message that Outlook cannot connect to t...

How to Fix Outlook Rate Limit Error in Office 365

Understanding the Error

You may see a message like "Too many requests" or "Server busy" ...