I just installed Adobe Premier Elements and Photoshop Elements 2021, and neither will open. I tried opening a picture with "open with" then choosing Photoshop Elements 2021, but it still won't open. I am running Windows Version 10. Any advice/help is appreciated!
If you check the task manager ('advanced view') does it still list the processes? Also: if you just start the programs using their default icons does the welcome screen show up normally? So: can you start the software stand alone?
If this continues to happen then may be you can try the option explained here:
This is a very weird issue, one which is still bothering me as well from time to time. At one point I was convinced that the DNS settings could be related to this problem, only to run inthe the exact same issue one week later.