Which Windows operating system do I have?
Two ways to determine whether you are using Windows XP or Windows 7:
1. The Start button
Windows XP Start button
Windows 7 Start button
Note: The Windows 7 Start button does not indicate whether you are using a 64-bit or 32-bit operating system. Please refer to the Computer Properties below.
2. Computer properties
In Windows XP, to view the Computer properties you would right click on the icon on your Desktop, select Properties, and you would see...
In Windows 7, to view Computer properties you would click on the button, right click on Computer in the right-hand column of the Start Menu, select Properties, and you would see Windows 7 Enterprise listed as the Windows Edition. In the System information, the System Type indicates whether you have a 64-bit or 32-bit operating system (important for certain software used at Calvin).