HOW can I FIND ON THE OPERATING SYSTEM that CAME WITH MY HP Pavilion A6142N

I use a Windows 8 operating system, due to my work I need to use windows 7, I bought this computer and I'm not sure what she had on her at the origin or even if that counts down the slope for window 7.   my HP model is a6142n and the product # is GG045AA-ABA.   I want to make sure I'm a computer to use once I made the downgrade.  How can I know what this computer came with me this computer is a 2007 model. ?

Hello

He ran Vista initially and Yes 2007:

http://support.HP.com/us-en/document/c01075987

Kind regards.

Tags: HP Desktops

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