General discussion

Windows Vista SP2 versions.

I want to upgrade to Vista SP2 from SP1, but the download site offers 2 versions - X86 and X64. Which version do I choose ? Thanks.


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If your OS is

If your OS is 32-bit you want x86, 64-bit is x64. If you don't know how to tell which you have, use Google to find instructions.

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Windows Vista SP2 Versions

And pray tell, why X86 and X64 instead of X32 and X64?


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One of Intel's first successful processors was the 8086. Then came the 286, 386, 486, and the Pentium was internally known as the 586, and all CPUs after that are said to be 686 class.

x86 is a shorthand notation to refer to the common instruction set used by all of these CPUs. The "x" is a standin for any number between 2 and 6. x64 is a more recent notation to refer to 64-bit x86 CPUs. The proper name for them is x86-64, but that's kind of obnoxious to type out, so Microsoft shorthanded it to x64.

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To find out if you are running 32-bit or 64-bit...

Hi Christy,

To find out if you are running Vista 32-bit or 64-bit, do the following:

Click the Start button, click Control Panel, click System and Maintenance, and then choose System.

Under System, you will be able to view the system type.


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