1. Windows Central Question's Avatar
    how this happen? my pc is so lag now..

    if i revert back to old os can i upgrade again to 86x for free?

    or i need to buy key now?
    08-01-2015 11:57 AM
  2. xandros9's Avatar
    that isn't possible, you can't upgrade from 32-bit to 64-bit without starting from scratch.

    If you get back to your old OS you'll be able to upgrade again, but how do you know its x64/64-bit? Have you tried a system refresh?
    08-01-2015 12:23 PM

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