web browser problems:

everytime I'm using my web browser (any) I am just why the heck!?, it get's me pissed off! LAGs all the time, I did checked my CPU usage and its kinda low now I'm thinking if someone is using a Ping of Death againts my port 8080, im newbie about this thing any1 can tell me how to secure and check whether who's w/ the black thing proj. against me??