I tried installing ue4.10 and got this error code not entirely sure what to do.

Hello everybody. Try run the luncher as administrator, that Works for me.

Error code E-1223

Linderdavid.com (Linderdavid.com) December 20, 2015, 1:20am 5

I am having the same issue and my system is up to date. I am on a windows 7 Ultimate.