help with trustedinstaller nd system32

I downloaded bittorrent and it somehow took over all my shortcuts on my desktop. I uninstalled it but all my files on my desktop now show a white page and when I try to start it I get a window open with and the file name within it. In my admin tools I have noticed that TrustedInstaller shows <failed to read description error code 2> also when I try to run a program that runs from system32 I get the error C:\Windows\system32\cmd.exe application not found, this happens with all .exe commands in system32. it is vista business I am running. Can anyone please help. Thanks in advance Benji