How to check whether my PC is 32 bit or 64 bit?

How to check whether my PC is 32 bit or 64 bit? 

What is the difference between 32-bit and 64-bit versions of Windows? 

The terms 32-bit and 64-bit refer to the way a computer's processor (also called a CPU), handles information. 

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

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: 

1. Open System by clicking the Start button , right-clicking Computer, and then clicking Properties. 

2. Under System, you can view the system type. 

If your computer is running Windows XP, do the following: 

1. Click Start. 

2. 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.

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