Game's crashing

Hello guys ! Since the last update you made or something , the game crashes when I simply alt-tab it . And I don't abuse the alt tab , because I can't , the game crashes after the first time I use it . Before the game was crashing after using the alt-tab for 3-4-5 times, this is not normal either , but anyway... The send error report thing , I don't find it useful at all , as long as this error exists since forever . Hope you don't find this thread harsh or something , my regards .