Have you tried switching off laptop and then boot up again?
Failing that, try uninstalling/reinstalling the program
If still not able to open, I suggest you post on this forum PSE&More for expert knowledge/advice. (Sorry TA ;) ) It's a very active forum with a lot of expertise specializing in Photoshop Elements (& More)
If all else fails, contact Adobe. They're generally very helpful
I'm sure you'll resolve your issue :)