I am newbie in Ubuntu (using just half a year). Laptop Samsung NP530U3 13' At first I installed Ubuntu 11.04. After several months I got Network Problems: When in Chrome(I tried other browsers also Firefox, Chromium ) I watching Flash video, after couple of minutes error appears:
Shockwave Flash has crashed and obviously video is crashed. The same happen when I start Skype video chat. Skype is crashed after couple of minutes. This problem is not happen when I connected via VPN. I go back to 10.04 LTS when laptop starts freezing if I plug-in network cable. But situation didn't change.

Can you give me any piece of advice? Thanks in advance.