Windows7 boot prompts check file system on c two reasons analysis

recently a friend in the Win7 Ultimate boot, encountered the check file system on c prompt, and then after a period of time to boot to the desktop, boot speed is very slow, What is going on here? The following small series takes the Windows 7 Ultimate system as an example to introduce the reasons and solutions for the booting file system on c.
First, the reason analysis: Win7 system booting file system on is due to a file error on the hard disk or hard disk has bad sectors (other forced power off will also occur such a problem) Second, the solution: 1 If it is due to a system file error, after the occurrence of "checking file system on", nothing needs to be done, let the system repair the file error by itself, the next time you boot, there will be no problem. 2, if it is caused by bad sectors of the disk, the performance of the system after the repair file appears, the next boot will also appear "checking file system on C", the interface, it is very likely that the hard disk has serious bad sectors, resulting in files Frequent mistakes, it is recommended to replace the hard disk for such problems, otherwise it will sometimes lead to the loss of data. The above is the reason and solution for the Windows 7 boot prompt checking file system on c. After the above explanation, I believe that everyone can use the Win7 system to appear "checking file system on C".