Verify your game cache files. Let it download and replace what it needs to. Make sure you are using a dedicated graphics card (GPU) and not on-board graphics.
Without more info on your OS and computer specs then you not going to get much help.
I've done this, as well as deleted all UMM. I can join a game quick enough and switch servers via the "friends" tab on steam however the launcher will always crash after 30 seconds of being open. Game occasionally crashes at random as well.
Windows 7 64bit
Processor - Intel i7-4700MQ @ 2.4GHz
Memory - 16 GB
Graphics - Nvidia GTX 770m
TheTots wrote:I think this thread has run it's course......