Did you check the obvious places like add/remove programs and the start menu?
Thanks for your response. Sorry about the terse original post. I did all the following listed below and there isn't a trace of it, but our internal tool used to track these things still reports it installed. I'm beginning to think the internal tool may be bugged. I even went so far as to install BitTornado and then uninstall it using the conventional method (Add/Remove Programs), which succeeded in uninstalling the new install, but the tool still reports it there. Here is what I did (I'm assuming BitTornado and BitTorrent are similiar) from http://www.dessent.net/btfaq/#now_what
Go to Add/Remove Programs in the Control Panel. There should exist an entry for BitTorrent. If it's not there, suspect an incorrect install. You can always reinstall the latest version and then uninstall it.
If you know what you are doing, you can manually remove BitTorrent by deleting the directory C:\Program Files\BitTorrent\ (substituting the actual location of your Program Files dir) and removing the following registry keys: