Can't start site in IIS (use by another process)

Question

When I try to start a site in IIS it says:

the process can\'t access the file because it used by another process

I searched in Goog

Answer 1

Check using netstat -aon or netstat -aon | findstr 0.0:80 in a command prompt to see which Process Id is LISTENING to port :80 and then watch for that Process Id (PID) in Task Manager with view->select columns-> process id checked. End that process, restart IIS and you are done. (Note: if you have Skype installed, try exiting that process first.)

In a modern Task Manager, you need to go on the Details tab to search for the PID. Or, as mentioned by @Nikita G in the comments, you can use this command to find the task from your command prompt:

tasklist /FI "PID eq 123"

Note: change 123 with the PID returned from the first command.