Can not launch unreal

I install the epic game account and download the unreal version 4.10 but everytime i want to launch the programm just get stucked. No matter if i choos a blank project or a first person and so on. I tried this on my two computers at and i have on both computers the identicaly probelm. I also creat a new account and deinstall and install everyting, but nothing seems to work. I also download different version but it is always the same problem.

My hardware:
Intel core i7-4650U CPU 1.70GHZ 2.30GHz

does anyone has an idear how to fix the problem?

graphics card?

If you have the launcher, click on the little triangle pointing down in the installed version of the engine and click “Verify”.