
Check if a Port Is Already Allocated Using Command Prompt
When you start a service or application and get an error like "Address already in use" or "Port i...
Software troubleshooting desk

When you start a service or application and get an error like "Address already in use" or "Port i...

OneDrive sync error 0x8004de40 typically appears when you try to start or resume syncing. The err...

If you're stuck in a PowerShell login loop—where the console repeatedly prompts for credentials o...

You're trying to connect to a server from the command prompt, but the connection times out. The c...

You open PuTTY, enter your server's IP and port, click Open, and get "Connection refused"...

You open Windows Terminal to connect to a remote server or use a tool that depends on HTTPS, and ...