Windows – DISK BOOT FAILURE after upgrading power supply

bootpower supplysatawindows 7

After upgrading my power supply, I get the following error message when trying to boot into Windows 7.

DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER

My Windows 7 installation is on a SATA hard drive.

I'm able to fix this problem if I hook up my IDE hard drive, then it boots the SATA hard drive fine.

I don't like this solution though because then that means my IDE hard drive is drawing power even though it isn't being used.

Why would a newer power supply need the IDE hard drive hooked up just to boot into the SATA hard drive? There are no boot files on the IDE hard drive; it is completely empty. My old power supply did not need it hooked up in order to boot the SATA hard drive.

Best Answer

Try booting to the recovery console with your install CD (which is a recovery disk), without the IDE disk connected (thanks Neal), and doing:

bootrec /fixmbr
bootrec /FixBoot

This will restore your master boot record and boot loader.

You will, of course, want the SATA drive set in the BIOS as a (probably the primary) boot device.

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