I was installing Autocad 2010 to my windows 7 laptop. I have also installed the microsoft.net framework 4 from this site http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=17851 however, when i begin the installation process, a black screen just pops out and then gone. nothing happened. The installation didn't push through... what could be the problem of the installation process? PS. I have also turned off my antivirus. Hope you could help me God bless.