Try windows xp profecinal 32 bit. Windows 7 is a 64 bit programme. NFS Undercover works fine on my pc. NFS Undercover was released befor windows 7 was released. The game is compatible for 32 bit programe. Also make sure that you have Active x and flash player as some games need this software to operate properly. Try running registry regenirator. fauly sectors on your hard drive can cause a problem. The regenerator will repair the faults on your hard drive. Back up important imformation on a flash drive or dvd as not all hard drives keep the data after generating them. Syems restore comes in handy after regenerating.