Read Disk Error , press ctrl+alt+del to restart?

[MeenaBassem]

ok guys, i don't know what's going wrong with my pc, it was working just fine, all that was running was firefox, wmp and utorrent and it was working just fine on windows 7 ultimate
and just without any reason, it started to get slow and not respond, i waited for some time and nothing happened, i restarted the computer and now i get read disk error. press ctrl+alt+del to restart.
i don't think there's something wrong with my HDD , i can explore and use it all with knoppix live cd which i'm using now to ask that question
i don't know what caused that or how to solve it, i found some common answers to that on google. but nothing seemed to work

any suggestions?
what kind of hard disk problems? i don't wanna lose my data on it

[Frostfire]

Boot from the OS install disk, and chose the console, the type "fixmbr", this will repair the Main Boot Record.
If tha doesn't work, you will need a new Hard-drive, set the new one as master, if it is an IDE one, and the old as slave, Install the OS on the new hard-drive, and you can access the old one.

[AimeshN]

try to open windows in safe mode , if it doesn't work then try to repair windows using a bootable disk. it should help. It will no delete any data on your harddisk. Good luck

[AimeshN]

try to open windows in safe mode , if it doesn't work then try to repair windows using a bootable disk. it should help. It will no delete any data on your harddisk. Good luck

[AimeshN]

try to open windows in safe mode , if it doesn't work then try to repair windows using a bootable disk. it should help. It will no delete any data on your harddisk. Good luck

[AimeshN]

try to open windows in safe mode , if it doesn't work then try to repair windows using a bootable disk. it should help. It will no delete any data on your harddisk. Good luck

[Lana]

try repairing windows but it sounds like a hard drive problem.

it could just be a failure of the hard drive. can you hook up two hard drives? if so you can transfer your data. also, have you tried repairing windows with the disk?