Well, apparently I'm very first person from Iran that having this problem and I'm not proud of it. SN/ 9QM72D43 ST3500320AS P/N: 9BX154~303 Firmware: SD15 Date Code: 09155 WWN: 5000C5001069877C It worked about 5 or 6 months for me and there's a very annoying thing in my head. Microsoft should have known about this problem, so why the firmware upgrade isn't in Windows Update? I'm really p***ed off now, I've downloaded bit by bit with 256k / collecting my favorite things from rapidshare, depositfiles, ... and P2P programs, I can't describe how I worked my fingers to the bones, now they're all gone. No, A new Disk Drive can't be of help for me. Someone should sue them