I just bought Oblivion GOTY edition on Steam today, and it doesn't work.

When I start it, I get the startup menu with options like play, data files, etc. and when I hit play, the game crashes with no error message.

After some investigation, I tried fixing it by setting bMusicEnabled=0 in Oblivion.ini This worked, and I was able to get the main menu, which I closed right away. However, I have not been able to start Oblivion since then, regardless of the .ini settings.

I have no idea why it could have worked once and then stopped. Does anyone have any idea what is going on?

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My system specs:

Intel i7 930
Geforce GTX 470
Onboard sound (Which is why I suspected the problem was related to music)
Windows 7

The problem was dual monitors.