Why wont epic games launcher open?

I want to play fortnite so i go on the website click download and everything goes well and the downloading works, the epic games launcher pops up on my desktop and when i try to open it nothing happens, i have tried opening it from the search bar in the bottom left corner on windows, still nothing happens. can somebody help?

Well what does task manager say, when you hit the Icon does it appear in your task bar (assuming windows)?
if task manager says there is an instance of the launcher open then it might not let another launch, so kill all instances and try again.
as if it where on the task bar, it might have put it self on another screen.

would also try to kill all instances of it, and run as admin to check for permission changes.