Win7 system boot Prompt "Non-system disk or disk error"

Specific reason analysis: for the Win7 operating system, this fault occurs mainly on the computer where the hard disk exists 100MB hidden partition, because the hidden 100MB partition holds the boot file of the Win7 system, and by default, it is the active primary partition, When the user mistakenly sets the current C disk as the active partition in the Disk management, the problem of unable to find the active primary partition occurs when the power is turned on. This failure also occurs frequently after a new hard disk partition, when using Ghost to install the Win7 system, the Win7 system cannot be started after ghost because the primary partition is not activated.

Workaround:

1, first in the Win7 PE maintenance system to boot to PE, the main partition can be reactivated;

2, after entering the PE, first right mouse click "Computer" Select the "Management" option, and then in the Open Interface select "Disk Management" option, in the need to change the primary partition right click, select "Mark partition as active partition" on it.