Could not Install - Installation file is Corrupt

I get to install the Launcher, etc, however, when UE4 finished the initial Download of 7 gigs, it never finished downloading, it goes back and tries to download another 7 gigs, after it has finished “verifying install”

When it DOES stop, it says, installation is corrupt.

I have tried 3 - 5 times and same results, no difference.
I’ve re-installed and installed the software again.

Help !

  1. Make sure that you have fully admin rights on your pc
  2. try to download/install it without a firewall or/and anti virus