Call of Duty 5 error

[Azeroth101]

When I try to play singleplayer COD5WAW, and since you must be signed in online to even play singleplayer, I try to create a profile and it crashes giving me "unhandled exception caught" as an error message. Looked it up and many say it may be a sound card problem but COD4 has been working fine. And as for the solution of deleting player profiles, thats not even in my COD5 directory.