Hello all,
I had Cura 4.2.1 running fine since its debut. My Windows 10 Pro 64bits was version 1803, but it decided to update itself to version 1903 last week, and it crashed my system beyond repair.
After formatting and reinstalling everything, already with Win10 ver 1903, I installed Cura and faced this same issue, i did not even get the Cura splash screen.
The solution was to kill Cura task on Task Manager, because it was kept on background, and start it as administrator once. It came up normally and I disabled that checkbox "Send (anonymous) print information" on Cura's preferences config. I guess now that I could just allow Cura through the firewall as well.
Anyway, the important thing is that I did not delete any previous config folder and did not loose my printers and materials personal settings. And no need for keeping Cura on compatibility mode, after the first run as administrator, it will run every time as normal.
Hopping for having been helpful to someone, best regards.