Last night I was surfing, when I lost my internet connection, so I opened my network folder and my homegroup had changed from home to work. So I was attempting to find the place to change it back, (which I never did). Anyway all of a sudden everything I tried to open stopped responding. So I tried to use the troubleshooter, it would not start. Then I decided to do a system restore, I got a message that the C drive was not accessiable. I also use Avenquest Fix-it, which does a more indepth restore, it gave me the same message about the C drive. I went to "MY Computer", C drive was listed, but did not show the size information. I clicked on it, got the same **** message. I grabbed my restore disk, I made when I installed 7, it said that it could not find the OS. I got the original install disk, and tried to do a repair. It said that there were no System Restore points on C. Which I have allocated 10% of the drive for these, and do a restore point at least once a day, and every time before, and immediately after I make any changes, such as installing a new program etc... I then booted to XP, it also said that the drive with 7 was not accessiable. I can boot to 7, I have access to any OS related folder, such as Control Panel, the Network folder, Help and Support, however none of the links inside any of these folders work, (H&S "service not available", troubleshooter, user accts. admin prog. "service not available"). I was just surfing the internet, no other programs were running, except Avast Antivirus, which it did not show a pop-up that it detected a virus. What happened, and how do I fix it, short of reinstalling?