I'm trying to fix a friend's HP Mini 1212. It boots into Windows, but when you try to click on the Windows button to access anything, the screen goes black and a message comes up saying "Windows could not start because the following file is missing or corrupt: \Windows\System32\Config\System. I created a MS-DOS bootable flash drive, rebooted the computer and tried to run chkdsk but it is saying bad or missing file. What am I doing wrong?