Should I use 32 bit link or 64 bit?
Is there a difference?
Yes. Your computer is either 32 or 64
How can I tell if my computer is running a 32-bit or a 64-bit version of Windows?
To find out if your computer is running a 32-bit or 64-bit version of Windows in Windows 7 or Windows Vista, do the following:
Open System by clicking the Start button [http://res2], right-clicking Computer, and then clickingProperties.
Under System, you can view the system type.
If your computer is running Windows XP, do the following:
Click Start.
Right-click My Computer, and then clickProperties.
If you don't see "x64 Edition" listed, then you're running the 32-bit version of Windows XP.
If "x64 Edition" is listed under System, you're running the 64-bit version of Windows XP.