[Abyssaldemon]

Is there a way to just completely flush and restore a brand new copy of the Vista mbr?

[Elvandil]

Not sure I understand what you want to do, but this may help:

SGD Boot Disk - This zip file contains both CD and floppy images. This boot disk can hide and unhide partitions, activate partitions, boot Windows or any other OS whether there is an MBR present or not, boot from a second drive, restore Windows boot (equivalent to fdisk /mbr or fixmbr), add or remove GRUB, restore LILO, live-swap drives and more.

[uhaligani]

Click Start, then Accessories, right-click the command-prompt shortcut, and then click Run as Administrator.
The Bootsect.exe is used to restore the Windows Vista MBR and the boot code that transfers control to the Windows Boot Manager program, so you need to insert your original DVD in the drive. Type the this command at a command prompt:
Drive:\boot\Bootsect.exe /NT60 All

( Drive is the drive where the Windows Vista DVD is located. - E. F. etc..)