Backdoor Trojan....?

K well i was fooling around with a friend of mine, and he said, i betcha i can open ur cd-tray from my house etc… whatever, so he tolled me to send him a picture file and he got my IP through that, then after a few minutes idk how he did it but N-E ways i got a trojan of some sort.

What i need to know is if u guys have these files on your computer, or if these files were installed by the trojan

C:/WINDOWS/System32/reginv.dll

C:/WINDOWS/System32/winkey.dll
C:WINDOWS/services.exe

Those r the ones that seem to be “infected” (says McAfee)

K thanks in advance, i might not be able to post agin for awhile…