Need help with windows 7 64 bit

thenemesis360

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Oct 31, 2014
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So i installed my win7 ultimate 32 bit, and upgraded to windows 10, it has a serial code, if I want to go to windows 7 64 bit as I need the extra ram, do I need to buy a serial code, or just a installation disk? Fast replies appreciated,
Thanks for your time!
 

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