Issue
How to identify what ports are being used on a PC.
Product Line
All product Lines.
Environment
Any Windows OS
Cause
Running multiple applications on the same PC without managing TCP/UDP port assignments can lead to conflicts.
Resolution
TCPView will help you identify all ports and services to each application.
Download from Microsoft's website http://technet.microsoft.com/en-us/sysinternals/bb897437.aspx
Detailed instructions are available at the site.