Long story. I do have up to date virus scan and firewall. The first time I had problems, I atrributed it to a game I had installed. Each time I talked to Dell they assured me it was some sort of software issue, not hardware. Nothing common seems to set it off. I'll restore the thing (pc restore) not system restore, it'll work great for a month to where I'm just feeling it was something wierd and then bam it happens again. Once I had a virus that I removed, but it started the blue screen errors. Once I had spyware that I couldn't remove. A couple of times I have no idea what set it off, I just notice major sluggishness on the computer like it's really struggling to do simple things and then bam it crashes. It had been working for a month and then last night I was about to burn a CD and when the window popped up it was sluggish. Definitely seemed off, so I set it to burn and when I came back it was the blue screen. When I restarted, blue screen again with the unmountable boot volume error, restarted again and it's been working fine all day. I'm really starting to feel like there is something wrong with the computer itself, but since it's sparodic it's hard to pinpoint. My gut feeling is that it's something with the hard drive, some sort of sparodic memory leak, or some component on some pcb that's just not quite right. I was an electronics technician in the navy for 5 years so I understand troubleshooting. My pc knowledge level is probably 7 out of 10.