I have a PC with Intel (R) Core(TM)2Duo CPU. When I had bought the PC 4 years a go I was using it for spreadsheets but now I would like to use AutoCAD on it. I am not sure but can I upgrade the PC to i7,6GB Memory and 1GB NVIDIA video card. Hope to hear your views soon. Thanks

Hello ambereen. you cannot update your current PC to Core i7, et al. You need to get a decent motherboard for that, and also, for AutoCad I will suggest AMD FirePro or Quadro GPU. This site by Autodesk will help your selection of hardware: http://usa.autodesk.com/adsk/servlet/syscert?siteID=123112&id=18844534.