Cubase Elements 7 won't install on my PC

Ok, gurus, something’s amiss… I just purchased Cubase Elements 7, and have tried to install it on my Windows 7 (sp1) PC, with no luck. When I click on “Install”, I get about 2 seconds of disc turn, then a window pops up saying “Setup has stopped working”, and the screen goes back to my desktop. I’ve closed my AV software… didn’t help. What am I missing??? Please help!