I'll repost this from another guy since it didnt get any anwsers.

" Hi, I have an issue: During matches at least once in a day the game freezes suddenly. None of the buttons work. I hit alt tab and my pc reacts so slow. It seems pc also freezes. After 4-5 seconds alt tab works, when I switch back to Rocket League nothing changes in the game, it is still frozen. Then after some time either I become out of game/server or the game continues as if nothing happened. Other players in the match don't encounter such a problem. This wasn't happening before. I had given 3-4 months of a break. After I re-installed the game again this problem started. My pc is good enough actually. I have gtx 1060, i7-6700hq, 16 gb ram Laptop. Anyone having same issues, or solution ideas? "

I've tried this so far: Borderline "Windows Explorer and go to this location. (C:\Users(Your User)\Documents\My Games\Rocket League\TAGame\Config\TASystemSettings), then make sure your TASystemSettings are not set to Read Only and then open up this file in Notepad. Now scroll down until you see "borderless." Set this to True and then Save and close. "

But the thing is can't find the borderless config inside the document..

Help please?