Torrent download error

When I try to download a torrent I keep getting a the process is being used by another program error. I not doing anything else on the computer when these are downloading. So what is causing these errors to come up.

what I meant to say was, after downloading a torrent and putting it in utorrent. I keep getting the process is being used by another program error. I not doing anything else on the computer when these are downloading the file using utorrent. So what is causing these errors to come up.

Torrent engine is still runing, check in taskmanager.