Upgrade-windows-help

Hello,
I upgrade my windows 7 professional 32 bit system to windows 7 ultimate 32 bit, but I want to upgrade to windows 7 ultimate 64 bit. I how 4GB of memory, only using 2.75GB of memory. I upgraded my system using the anytime windows upgrade to upgrade now I can't. can anyone help?
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  1. The title of this topic has been edited by Mousemonkey
  2. this can only be done with a full install. period. doesn't matter how you try, it has to be a clean install.
    32-bit OS upgrade is not an option to 64-bit OS.
    with you current RAM and 32-bit OS you might want to pull out RAM and then perform re-install
    and see if you can at least get back to the 3GB RAM from the 2.75GB you're at now
    but that's no guarantee.
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