How to know the processor type in Windows XP, Vista and 7.

The terms 32-bit and 64-bit refer to the way a computer's processor (also called a CPU), handles information. Some software manufacturers have 32-bit and 64 bit versions that must be used on corresponding  processor  types.

Generally users  with 64-bit processors  can install 32-bit software  versions,  but users with  32-bit processors  CANNOT install 64 bit versions of software.

The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than the 32-bit version.

Step-by-step guide

Follow the steps in the sections below to find out if your PC is running the 32-bit or 64-bit version of Windows and what edition of Windows is on your PC.

1. Computers running Windows XP

   • Click Start, right-click My Computer, and then click Properties.
   • If "x64 Edition" is listed under System, you’re running the 64-bit version of Windows XP.
   • If you don’t see "x64 Edition" listed under System, you’re running the 32-bit version of Windows XP.

   The edition of Windows XP you're running is displayed under System near the top of the window.

   1. Computers running Windows Vista or Windows 7

   • Click the Start button , right-click Computer, and then click Properties.
   • If "64-bit Operating System" is listed next to System type, you’re running the 64-bit version of Windows Vista or Windows 7.
   • If "32-bit Operating System" is listed next to System type, you’re running the 32-bit version of Windows Vista or Windows 7.

   The edition of Windows Vista or Windows 7 you're running is displayed under Windows edition near the top of the window.

    

   
   
   

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