Ok so I have been having this problem for about a month now. I can't for the life of me figure it out. I got rab coming over tomorrow to look at it but looking for what other ppl think.
I'll start out by saying i have fast Internet. my speed test is 14 ping, 90 dl and 13 ul. My lan driver is up to date and I even tryed rolling it back and reinstalled windows. So my problem is when I launch bf while it's booting up every thing is fine. But as soon as the last boxes load up on the main screen, It starts to lag bad. How I know this is I go back and forth over my friend's list at the top and it lags out. Going into game it will take for ever to load and lag the hell out of me and makes it unplayable. This is not just limited to this game other games do the same. While on surfing the Web there is no lag at all. Also I have my comp and my son's hard wired to the router and his comp is fine with no lag. I have also tryed buying a lan to usb connector to see if it was my lan port.