If the master boot record becomes corrupt you will lose access to your drives sometimes. I don't know how to fix it I just know it has happened to me before with the same symptoms you are talkimg about.
Each time I startup my computer my default sound device gets changed by Windows. I have a usb headset for gaming which is only used by a couple of programs and my default audio device is supposed to be my sound blaster audigy sound card. I set it to default everytime I boot up but if I shut down...
Punkbuster is working for a very few select games and they will not support a beta OS. I play BF2 and it does not work on windows7. The only game I have heard of that works with punkbuster is COD WAR.
Battlfield 2, Battlfield 2142, Call of Duty 4 cannot be played in multiplayer on punkbuster servers.......Evenbalance acknowledeges the incompatibilty with Windows 7 but refuses to fix the problem untill the retail release of Windows 7. Doesnt make much sense but I guess they want to wait until...