Doom 3 won't work [solved]

I just buyed Doom 3 from Steam and I got this error:
Couldn't load default.cfg
I can't see any default.cfg in c:\program files\steam\steamapps\common\doom 3\...
Does someone know how to fix that or have a copy of default.cfg?
Thanks.

Try the file integrity check feature in steam. It looks like something happened during the download.

Something happened after the download. Steam told me it was finished but when I restarted my computer, Steam updated Doom 3. So now it works fine.