that's a little more complicated...
Meister, now that is even more complicated : need to take a look at registry and run a scan to see what ports are used and so forth, I do this for a lot of people, as I am in the computer network/security field among other things ...LOL
I do offer a consulting service as well if you are looking to have some one check the PC to make sure it is not tampered with, PM me for details