So when I try and login through the launcher it just hangs for a minute then says it cant connect. I redownloaded the launcher but when trying to install it returns an error "invalid drive f:". I dont have an f:\ drive. When i try to even uninstall the launcher I get the same error. This started after installing 4.11, not sure that has anything to do with it.
Hi Rotlaust,
I’m sorry that you are having an issue with the Epic Games Launcher. In order for us to offer the best support, we have recently modified the process for how Epic Games can help troubleshoot your Launcher issue. Please visit http://help.epicgames.com/ for technical support, here you can find information and solutions for common issues, as well as a contact form if you still need additional assistance. Thanks!
I have found a solution for this problem.
So I downloaded this application called “Revo uninstaller” and selected Epic Games on the list. It deletes all the leftovers from the registries. After I finished deleting everything it let me install the launcher 
I hope it helps!