If you installed Windows XP after Windows 7, you’re left with the XP-MBR on your drive and thus only XP is booting.
If you happen to have hardware, which produces the Code 5 error upon trying to boot from the Win7-DVD, you can do the following to restore the Win7-MBR from within XP:
- boot into XP and insert the Win7-DVD
- open a Command Prompt
- navigate to the
?:\boot\directory of the Win7-DVD (with?being the letter of your DVD drive) - run the following command: (with
C:being the drive where Windows 7 is installed)bootsect.exe /nt60 C: /mbr - reboot and use EasyBCD to add Windows XP to the Win7-Bootloader
On unawave.de you’ll find instructions on how to create a Win7-DVD with the Vista-Bootloader so that you don’t get the
Code 5 anymore.