I'm pretty sure that when you load up the program itself - to play the game.
There is an uninstall option on the first menu you come across.
Hmm, you're right. I've been using OBSE to start up my game for so long that I'd completely forgotten about that.
However, when I click it, it gives me this message: "The Oblivion launcher could not find the uninstall program. Run the setup.exe on the Oblivion install disc to uninstall."
I don't know how to do this. Any ideas?