Swipe in from the right edge of the screen, and then tap Search. Type Command Prompt in the Search box, right-click Command Prompt, and then click Run as administrator.
2.At the command prompt, type the following command, and then press ENTER:
sfc /scannow
Details as below:
http://support.microsoft.com/kb/929833/en-us
try to run it in safe mode in this way:
1.Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer.
Click the Start button Picture of Start button, click the arrow next to the Shut Down button Picture of Shut Down button, and then click Restart.
2.Do one of the following:
If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start in safe mode, and then press F8.
3.On the Advanced Boot Options screen, use the arrow keys to highlight the safe mode option you want, and then press Enter.
4.Log on to your computer with a user account that has administrator rights.
if this error continues in safe mode, the hard disk may be broken, I suggest to try a new hard disk and install a new system.
Regards