If your computer uses Windows XP, then do the following:
Choose Start > Control Panel (or Start > Settings > Control Panel).
Do one of the following:
If the Control Panel is in a Category View, then click Performance And Maintenance. On the next screen, click See Basic Information About Your Computer.
If the Control Panel is in Classic View, then double-click System.
In the System Properties window, click the General tab.
If the text beneath System says Microsoft Windows XP Professional x64 Edition, then you are running a 64-bit edition of Windows XP. Otherwise, you are running a 32-bit edition.
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