what i would say to try is install version 5. make sure that you update the program (if just downloaded today then do not worry about that part, but if you have 5.0.377, then it is more of a must or re-download it) to make sure that it is fully updated, then reboot the PC. if that does not work, try rebooting it one more time. I know that this may sound silly but i have had a couple computers here that had problems where it wound not start up properly after installed. it would not even update. rebooting it one time partly fixed it but it did not completely work fine until after the 2nd reboot. If you are reading the registration info fine that it has time left and is registered, but not starting up, maybe try resetting the bois too. I have seen 1 time where that has fixed it too. those are my 2 suggestions.