Mostly offline but did try the most recent online and get the same result, appcrash 20 seconds after opening installer.

I am setting up a new Windows 7 machine and the only software I'm having difficulty with is Opera. I tried installing versions from 28-42 but the installer crashed shortly after opening (10-30 seconds). I did get Opera 24 to install but then the browser crashed shortly after opening. I've tried both standalone and traditional installations and neither work. I can install and run any version of Opera if I boot into Windows safe mode but the safe mode install will always crash in normal Windows operation. I have searched for and removed all traces of Opera from Windows including the registry but that has not helped. Out of ideas. Any help appreciated.