Packaged Unreal projects will not open on my PC

  • Does your packaged project show up in
    your TaskManager? > I can see the project showing up in the list of the processes.
  • Are you able to bring it to front? No, I don’t see an option to do so. Alt-tab or Win-tab won’t show my project.
  • Does it seem stuck? yes, stucked at 792 Kb.

Additionnal info: I recently switched to windows 10. Thinking it could change anything. When I was still under windows 7, I could also see two zombie processes of the same name of my project. Those two couldn’t be killed in any way and were preventing me to delete the folder (ofc, the files were still being used by a process).
The two processes have been created by the first try.