Not sure if this problem is related but.. I can't find a working solution anywhere.

When I run the launcher now, it's just a black window with the launcher version at the top. which is 2016.9.12 etc etc. Did the launcher update break something? Is that even the most recent launcher version?

I found some old info from over the years of this problem but none of the solutions (resetting IE, resetting router, removed router etc) have solved it. Also tried this "BootVersionCheckMode" thing and nothing changes.