Oblivion Launcher cannot find executable

[TSRDSam]

I've tried uninstalling and reinstalling the game twice, deleting everything related to Oblivion from my computer, every fix, but nothing works. The uninstall has the same problem. Every time I click "Play" on the launcher, it goes to the user account control and asks me if I want to allow it to make changes to my computer. Clicking on "Yes" starts the launcher again, and clicking play does the same thing, over and over until it tells me that it can't find the executable. Someone please help me, i'm getting desperate.