Question -
How to tell if you are running Windows 32-bit or Windows 64-bit software?
Answer -
For Windows XP click here
In Windows Vista or or Windows 7 -
Select the Control Panel from the Start Menu

followed by , System and Security

followed by System

and you will see in the middle section the "System Type"

With Windows XP you need to do the following -
Select the Control Panel from the Start Menu

followed by System

and you will see in "System" - it will only say 64-bit Edition if it is a 64-bit version, otherwise it is 32-bit as below

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