Keeps crashing when loads to 25% or under

So i am trying to install fortnite and the launcher downloads it to around 25% or under and keeps on crashing and i have to restart i have had trouble all night and all day trying to get this to work. Im sure my computer can run it.
4 core AMD processor at 3.6ghz
6 Gb of ddr 3 ram
750 Ti 2Gb Gddr5
400Gb storage. Windows 10
all latest drivers