To find out whether you are running a 32-bit or 64-bit system, do the following:
If your computer is running Windows 7 or Vista:
Open System by clicking the Start button
Right-click Computer, and then click Properties.
Under System, you can view the system type.
If your computer is running Windows XP, do the following:
Right-click My Computer, and then click Properties.
- 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.