If you are not sure what Operating System you are using, review the instructions below:
The majority of all IBM compatible (PC) users have Microsoft Windows installed on their computer. A good method of determining if you are running Microsoft Windows 95 or later is to look for the "Start Button" in the corner of your screen. If you see this button you are running Microsoft Windows. To determine what version of Windows you are using, see Microsoft's help site.
If you do not see a Start button it is likely you are running a different operating system.
Mac OS X
All versions of the Apple Macintosh's operating systems will have the apple menu, a small apple icon in the upper left corner of the screen.
- Click the apple menu in the top left corner of the screen.
- In the apple menu click "About This Mac" or "About this Computer"