P2P (Peer to peer) game problem after Windows Update.

Hi all. Well this problem is sort of really complicated and complex, and I'm not even sure if this is the right section to be posting it, so I do apologize. I have tried researching this problem but was not able to come to a solution.

So I play this online fighting game that utilizes P2P, where basically players "host" these rooms where 1-7 other players can join (maximum of 8 including yourself), and you play and fight with each other in like a Street Fighter kind of way. I never installed my Windows Updates until I recently heard about the free Windows 10 reserve, so I went ahead and installed a bunch of "Important Updates" and "Optional Updates."

I was able to reserve Windows 10, but ever since the installation, I would have bad connection "lag" to these other players if the room has 4 or more players. This was never the case before. I have tried resetting my router and even reformatted my computer and the problem still persists. I have a strong suspicion that one of these Windows Updates may have caused this. Is there even a possible way to pinpoint this exact problem and uninstall/ turn of the update?

Thank you.