Plutonium

Ty but i tried this, and my pc is running perfectly this game i don't know why does he do this

Hi !
I have a little problem....
When i try to play at BO2 multiplayer i lag too much but i don't know why... 3 day ago it worked perfectly ! An other player have te problem, we tried to know why does it do that on the discord and they told to go on the forum for this problem...
I can't post any video here sorry

PS : Sorry if my english is bad i'm Belgian