Ive been experiencing some odd bugs since the 1.4 patch and Automaton DLC were installed. I have worked most of them out, but I cant seem to figure out what's causing this. Every time I open the game ,it minimizes itself a moment after the Steam popup appears in the bottom-right corner! It started out of nowhere. Not sure if its a mod causing it or what.

Any ideas?

I would suggest a clean boot: http://www.thewindowsclub.com/what-is-clean-boot-state-in-windows