First, the reason analysis:
Checking file system on when the Win7 system is turned on is due to errors on the hard drive or bad disk on the hard drive (another problem with forced power off)
Second, the solution:
1, if it is due to system file errors, in the presence of "Checking file system on", what do not need to do, so that the system repair file errors, the next boot will not be a problem.
2, if the disk is bad, the performance of the system on the boot appears after the repair file, the next boot will also appear "Checking file system on C" interface, then most likely the hard drive has a serious bad, resulting in files often error, for such a problem suggest replacement hard drive, Failure to do so can sometimes result in loss of data.
The above is about Windows7 boot prompt checking file system on C reasons and solutions introduced, through the above explanation, I believe everyone in the use of Win7 system appears "Checking file system on C" can be easily dealt with.