Start64!Tool to fix or create Master Boot Record (MBR) on harddisks, for instance when using Windows PE. With an x64-edition as well as the 32-bit edition. Now with experimental support for Windows Vista MBR! The new version has some new, cool features, like creating DOS boot sectors, changing partition types, etc!

Usage:

 MbrFix /drive <num> {/partition <part>} <command> { /yes } { /byte }

Requirements:

The program is made for Windows NT, Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7 and Windows PE. Both 32-bit and 64-bit x64 editions are supported.

You need administrative privileges to make it work!
Purpose:

Perform several Master Boot Record (MBR) tasks, like backing up, restoring, fixing the boot code in the MBR, etc. The utility should not be used for GUID Partition Table (GPT) disks. The utility now, by popular demand, also come in a x64-version running unde x64-editions of Windows and PE.