issue installing Solidworks 2014

Hello: All

I have a Window 7 operating system/ 64 bits; right now I'm trying to install Solidworks 2014 and a window pop-up saying that I have Windows Vista Operating system and cannot install Solidworks 2014 on this machine. When I go to 'window START/my computer/ right click properties--it says I have Window 7 Operating system.

Thanks

Do

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