I have 3 discs on my pc.2 ssds and one hdd.First ssd is for the OS second ssd for games and third hdd for storage.My operating system is win7 SP1.This usually happens when i install a game from my HDD to my SSD.The game will crash and when i go to "my computer" i cant see my hdd and ssd.Even in BIOS.It usually all come back after multiple restarts.I did a chkdsk on all discs and they are fine.Also crystaldiscinfo shows that all are ok.Iam on AHCI mode.Its a very weird problem.Any help woud be appreciated.( I forgot to mention that i get an "IsDone.dll error" before this happens.)