How to find which program is using a specific Windows port?

If you experience a python – Error: That port is already in use, or Apache’s: Port 80 in use by “Unable to open process”, it’s very likely that another program is already using the port. For anyone who ever experiences this kind of issue, or whenever you suspect that something else is using one of the ports, please follow these instructions to resolve the problem and find which program is using a specific Windows port. [Read more…]