getback windows bootloader

Get the Windows 8 Developer Preview boot menu back.

1. Start from the Windows 8 Developer Preview installation medium.
2. Optionally, choose your keyboard settings.
3. Hit SHIFT+F10 to enter the command prompt.
4. Execute bootrec /fixmbr to update the main boot record just to be sure, partitions will remain.
5. Execute bootrec /fixboot to update the boot sector of the system partition.
6. Execute bootrec /scanos to add known OSes to the boot configuration data.

Get it to list Windows XP.

1. Execute bootrec /rebuildbcd, this will rebuild the boot configuration data.
2. If that doesn't work, reboot and use bcdedit from Windows 8 Developer Preview like this:
   

   bcdedit /create {ntldr} /d "Windows XP"
   
   bcdedit /set {ntldr} device partition=X:
   
   bcdedit /set {ntldr} path \ntldr
   
   bcdedit /displayorder {ntldr} /addlast
   

   Please note that you need to right click the Command Prompt tile, then click on advanced in the lower right corner and then click on Run As Administrator. Replace X: by your XP partition.