lags with good ping (~50)

[ETc|Exagone]

Hi, i have a problem, i have a good connection (maximum 50 ping with Wi-Fi), so i lag (~10 fps).
The maximum of fps in my config is 125.
What can i do ?

Thanks for help.

[*0P*.!]

10 fps is not just lag this is m-m-m-monsterlag.I ask same what pc u have? sometimes i got over 300 fps but in warzone (full server) its only 20-40. Old pc.

[ETc|Exagone]

Before, i had a good fps ...
with win32 vista

I do a virus scan ?

EDIT : I have this problem only in ET, not in navigators or in other programs.