From Slave to Master, how to set the MBR?

Hi guys! So here's the setup:

HDD1 (master): installed Windows XP
HDD2 (slave): installed Windows 7

I'm migrating to Win7 but my problem is that I can't boot to Win7 if I switch the drives. I'm aware of the jumper settings and stuff. My guess is that Win7 boots off from WinXP 'cause WinXP was the master and has the MBR?

I just want to make the second HDD (Win7) to be the master and be able to boot in that OS. What should I do? Thanks guys :)
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  1. wow really? 30+ views and no single answer? :(
  2. Best answer
    Remove the xp drive and set the Win 7 as the master. If the Win 7 drive is a Western Digital then leave the master/slave jumper off. Leave out the xp drive for now.
    Follow the directions from here:

    Once Win 7 is booting correctly you can reinstall the old XP drive, setting jumpers on both drives as needed. You can then copy over any data and reformat the drive to your liking.
  3. Best answer selected by xr4v3nx.
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