How to Determine if your Processor is x64 (64-bit) Capable
Windows Vista has it's own version for x64 processors like AMD and some Intel. Windows Vista x64 Edition offers extra security features and some speed improvements. (for more information about x64, click HERE!)
Now to determine if your processor can run x64, do the following :
click Start
right-click Computer
select Properties
open Windows Experience Index (right side of your score)
Then click View and print Details.
When the details shown, Scroll a little bit and find System.
Just like this:
If you're currently running x86 (32-bit) you'll see different from this. But just look at the "x64 Capable" or "x64 System" or something like that.
Then that should be "YES"...