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32bit > 64bit is not done by any upgrade. It is done by a clean install. OEM licenses are for the bit architecture that they are bought with. If you want to change it, you have to buy it, which is no longer sold.
8 Νοε 2014 · You cannot perform an upgrade from a 32-bit version of Windows Vista to a 64-bit version of Windows Vista. You must use a full copy of Windows Vista to perform a clean installation of a 64-bit version. For instructions on how to perform a clean installation, see Installing and reinstalling Windows.
1 Ιαν 2012 · If you are running consumer editions of Windows Vista such as Home Basic or Premium, you can only upgrade to either Windows 7 Home Premium or Ultimate. Also, you cannot do downgrades, which means, if you are running Windows Vista Ultimate now, you cannot downgrade to Windows 7 Home Premium.
15 Ιουν 2008 · To answer your question about installing over the top of 32bit, the answer is no. You must do a fresh install when going from 32bit to 64bit. The only way you can do an upgrade is if you stick to 32bit Windows Vista.
5 Σεπ 2007 · #1. Hi all, I am currently on Vista 32 with 1 320GB Seagate and 2 GB of ram. I am not really sastify and want to upgrade: * From Vista 32 to Vista 64 (ordered the DVD and received)...
24 Οκτ 2009 · There is NO upgrade from 32 bit to 64 bit operating systems. A clean install is required. This applies to Windows XP 32 to 64, Vista 32 to 64, and 7 32 to 64 (and every possible supported combination of version upgrades.
1 Νοε 2011 · My primary machine is a laptop running Intel Core 2 Duo with Windows Vista HP 32-bit installed. I have 3GB of RAM onboard, and I want to do a clean re-install to Windows 7 HP 64-bit. My question is, is it worth upgrading to 64-bit with only 3GB of RAM?