I have a Lenovo g780 with Windows8 and I can't load my inventor software to it. I have been told my Lenovo g780 needs to have

[01dudley]

Specific Software! Need to downgrade to Windows7

 

[kenrivers]

What specific software are you being told you need? Is this (Inventor) the software from Autodesk? If yes, what version are you using?
Here's a link to system requirements for the 2009 - 2014 versions: http/usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=15402497&linkID=9242018