Unreal Engine Install:: 74% stuck

when intall gets to 74% install stops, when I attempt to do anythign else on my computer every thing else stalls, even windows explorer. I can’t even CTRL+ ALT+ DEL. am I doing something wrong adn this has never happened with any other install. I have attempted to install four times now with same exact result at 74%

Hey ,

Can you tell us your machine specs and OS? Thanks!

win 7 home premium 64
Intel i7 quad 2.60GHz,2.60Ghz
16G RAM
Nvidia 780M

After about twelve attempts it went through, once it got past 74% it was fine. still not sure what is issue was