Know Your Processor

i am no expert, but when i right-click on "Computer" and go to "Properties, here is what the screen shows, 64-bit in this case.

(Btw, i do hope you mean 'computer' when you say 'computeror')

Or, go to Control Panel, then System. Same result as above. (This is W7)

The information windows gives you is minimal at best, as you may be running a 32 bit copy of windows on a 64bit processor.

Software such as CPU-Z will give you very detailed information about every aspect of the processor. It's free and invaluable if you REALLY want to know what the processor in your machine is capable of.