Windows 64 bit upgrade

I have windows 7 32 bit installed. want to upgrade to 64 bit. I have a windows 7 64 bit upgrade.
Is 32 bit to 64 bit a possible upgrade?
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  1. Best answer
    it is my under standing that you can change from 32-bit to 64-bit but not the other way around.
  2. Can you upgrade? Yes but going from 32 to 64 requires a clean install.

    Also the 32 bit key you currently have also entitles you to the 64 bit version. Just need a windows 7 64bit install cd and your old key. You do not have to spend money on a 64bit upgrade key!
  3. I used an upgrade option from W 7 Ultimate (32) to W7 Professional upgrade (64)
    The result was not satisfactory. There existed a"old windows" which I could delete.
    Some programs from my W 7 Ultimate still showed up and I could not delete these (requiring Administrator rights) even that I had these rights.
    I formatted my drive and reinstalled with no problems. Even my serial for upgrade worked without problems for the clean install. I held in reserve Microsoft support at 1-800-936-5700 in case I would hav gotten the error 0xc004f061 for installing my upgrade in a clean install.
  4. Best answer selected by znieh.
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