ppbanlagfix

Second you will need to apply a fix. for the sever ban warning and lag problem.
You will need:

pbbanlagfix.exe found here

apply the fix as instructed.

You will have to restart the game a couple of times before this takes effect. Often even after this is done, the warning will come up for some severs. Some players have reported that if they ignore the lag and warning and continue to stay in the server for a short while the problem corrects itself, if and once this happens it should not appear again. I recommend not wasting you time as there are hundreds of servers, and with the fix applied many will work fine from the start.