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

Fix CMD Service Unavailable Due to Group Policy

Situation

You open Command Prompt and see an error like "Command Prompt has been disabled...

Fix Remote Desktop Connection Refused Due to Firewall

You try to connect to a remote Windows PC via Remote Desktop, but get an error like “Remote Deskt...

Fix Microsoft Teams Stuck on Loading with Error Code 0xca

If Microsoft Teams gets stuck on the loading screen and shows error code 0xca, the app can't star...

Fix Putty Connection Refused on Port 22

You try to connect to a remote server with Putty on port 22, but you get 'Connection refused'. Th...

How to Fix an Outlook File Locked Due to Sync Issue

You try to open Outlook and see a message that your data file (.pst or .ost) is locked. Often thi...

Fix Windows Activation DNS Not Resolving Server Name

When Windows fails to activate, the error often points to DNS problems — specifically, the server...