Win7 system prompts cdmsnroot_s.sys file damage how to do

1, first in the Win7 system into the hard disk to delete (c: /windows /system32 /drives /cdmsnroot_s.sys), you enter a pe select Win7 u disk system; > 2, delete the cmd run command chkdsk c: /f no longer is the c drive damaged, another matter;
(1) note the drive letter, must be your problem with the computer system disk, or else Still can't solve it.
(2) Note that the parameter /f, must be all permissions, read and write permissions to repair, /f means read and write repair, if you do not have this parameter, you will encounter this problem.
3, it is best to run this command again in the system after booting.