currently installed windows 7 on my PC. after a couple of days i added another HD on my system. when i restarted my PC it will no longer boot up. so i took out the new HD and restarted it again. unfortunately this time it will no longerboot up. so i deceided to re-install windows 7 after which i got the prompt the it can not install/repair my sytem since i need to enable the disk controller. what seems to be the problem?

Sounds like the new drive may have fried (or at least disabled) the controller. Two questions: 1. IDE or SATA? 2. Did you double-check your connections? If the BIOS shows the controller as active, you may be looking at a new MoBo (or at least a new controller card)...

it is an ide drive. checked the connection and everything is fine. i took it out just this morning and installed it in my other PC and after formatiing the drive, it works just fine. well, i think the card is done.