How to know if you are on 32-bit or 64-bit version of Windows

In Windows XP, Windows Vista, or Windows 7, to check whether you are using a 32-bit or 64-bit version of Windows, please click on the Start button, right-click on the Computer menu option, and then select Properties. In Windows 8, type Computer at the Start Screen and then click on the Computersearch result when it appears.
The System Control Panel will now open. In this screen you will see various information about your computer and Windows. One of the items will be called System Type and will contain the information as to whether or not you are using a 32-bit or 64-bit version of Windows. For Windows XP, it will only tell you if its 64-bit and it will be shown in the System area under the operating system name. If its a 32-bit version of XP it will not give a bit type at all.

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