Sorry--I see so many similar threads, but nothing spot on. Running Acer Aspire M3641 with 64-bit Windows Vista Home Premium. 4MB installed. 2 partition drive; one partition includes the OEM reinstall files. Machine has worked BEAUTIFULLY for a year...until today's blue screen. Blue screen unenlightening to me: 0x0000007B (0xFFFFF98000A069E0, 0xFFFFFFFFC0000034, 0x0000000000000000, 0x0000000000000000) On restart, F8 does NOTHING. Only options are Del (leading to Acer setup options) and F12 (boot device menu). Any effort to reboot leads to black "Windows Error Recovery" screen, with only "launch startup repair" and "start normally" as options. I can't change the option at all with arrow keys, so "launch startup repair" happens automatically. It fails quickly, bringing me to the same blue screen. I made a Windows Recovery CD per instructions here. Gave CD/DVD priority first thru the boot device menu, then by changing BIOS. NOTHING HAPPENS DIFFERENTLY. Even burned a 32-bit version in case I was going insane. Same result. The above is pretty much the limit of my programming prowess. Surely there's SOME way to run chkdsk??? My wife is freaking out over her work...heeelp!!!