latest versions worked, the last one I used was 4.6.0 , I now upgrade to the latest ( 4.6.3f ) and is not open , the task manager I see it load and give " not responding" and close with no error message . Have reinstalled several times including old versions any more work , I tried to run in compatibility with other versions of windows and nothing ( I use Win 8.1) , changed video settings, I disabled antivirus, and ran as administrator.
The question is, what should I do ? open to suggestions
Thanks since now for the atention
Have you tried holding the Alt or Shift key (I think it’s Alt)? That opens Unity in “Project Selection Mode”, rather than automatically opening your last project (which may be corrupt and causing the crashes).