Last night i was watching some video on youtube strong beeping noise came from my headset and everything froze, I restarted my computer and it took more than usual to boot up.Once it booted up in down right corner instead of wifi signal bar i noticed screen icon with cable and x next to it. It seems that it cant recognize my network card,i didn't touch my newtork card and it seems to be ok once i looked inside of the computer. I saw somewhere that it may be software uptade issue but i dont think so since my pc was bought 2 years ago and in my country they use hardware that no one updates anymore. I dont know name of my network card since i threw away box.