Just now I installed Windows 7 (64bit) and found that the following games does not work properly under windows 7. Call of Duty 4 Fallout 3 Battlefield 2142 Team Fortress 2
Fallout 3 and Call of duty 4 works fine on windows 7. You need to update your punkbuster with the PBSETUP application that you can download from evenbalance.com
After formatting with Windows 7 build 7000. I installed Call of Duty 4. But when I clicked on the MP icon I just got a black screen and in the task Manager it gave the error message "Call of Duty 4: not responding".
It seems that PunkBuster does not get along very well. I have tried many “solutions” you see online and none of them work. The error that most of us receive is “Windows API Error ######” It is something to do with punkbuster and Windows 7. PunkBuster has already stated that they will fix the problem after windows 7 is released to the public.