How to Know If You Have a 32bit or 64bit Processor or Operating System

think others do know this but for newbies info

We will first explain what is the difference between 32 bit and 64 bit processor and Operating System. Obviously a 64 bit processor can process more data much quicker than a 32 bit processor. However, if you use a 64bit CPU on your machine you also need to install 64bit compatible software to take full advantage of it.
A 64bit operating system on the other hand such as 64 bit build Windows XP or Windows Vista are cannot be used on a computer with a 32 bit processor but you can use 32bit software with a 64bit powered computer.

Now, How to know if your computer is 32 bit or 64 bit?
1. Click on your Start Menu
2. Choose All Programs
3. Go to Accessories then System Tools
4. Click on System Information


Look on your OS name and Processor. If it say's that you have x86 then you have a 32 bit processor. If mentioned that your processor is a ia64 or AMD64 then you have a 64 bit processor. If it said Microsoft Windows XP Professional x64 Edition Version then obviously you have a 64bit operating system. As you can see on my sample image above, it says that I have a 32bit processor and using a 32bit operating system.
If you are using Windows Vista, you can access System Information by using the same steps above. Start menu - Programs - Accessories - System tools - System information. You can also access it by typing system on your search bar in the start menu.