I have the same today. I buy a new computer and installed SU2014 with Vray 2.0. After render, I click save button or other buttons, It's freezing. I search on Google and read this topic but have no solution. After that I install Autocad 2012, it neeed Net Framework 4.0 for install, but current is 4.5. I unintall NFW 4.5, Install NFW 4.0 and continous install Autocad. When I run Sketchup and render another file, that problem is fix.