unreal install issues

unreal still loading prerequisites, is that suppose to take a long time?
i have a Alienware x51 R2
the download finished the 5 gigs but still loading prerequisites. Any ideas what be wrong?

i encouter this …the problem causing this is the microsoft visual c++ 2015 64x …all i did is i uninstall it …and download it manually in microsoft website then re run the launcher
hope this helps