I've been having a problem booting one of my computers lately. Since I added a second hard drive from another computer (one that should be non-bootable), my primary drive refuses to boot. Every time I start the computer, I get "BOOTMGR is missing. Press Ctrl-Alt-Delete to reboot." As a result, I have to put in my Windows 7 disc, reboot, and run this at the recovery console:
bcdedit /export c:\BCD_Backup
attrib bcd -s -h -r
ren c:\boot\bcd bcd.old
(From Microsoft Support)
After that, the computer will boot fine, but I have to to this on every single boot. Does anyone know what the problem might be and how to fix it? The problem persists after disconnecting the second drive.