While I was able to enter the game without any problems until a day ago, in 4:3 view, today I can't. When I click on the game, it opens in the background but I cannot enter the game. There is no problem in 16:9 view, but when I set 4:3, I cannot enter. The only solution I could find was to make my own desktop screen also 1024*768 (4:3). I don't want to deal with this solution every time. I verified the files, deleted and installed Steam and CS:GO but the problem did not go away. When I contacted the technical support of my computer, they said that I needed to talk to you. Please, please help me. 
Sorry for my bad English.

Sorry for my bad English.