internet

i found a reason the reason of the trouble on my pc.
LAN-CARD were My LAN-CARD was not working. that was why i wasnt able to connect to internet the internet.
so i went to the electrical shop and bought new one a new one.
but...it was unsuitable for my PC.
i went to the shop again. and i bought another one.
it is USB a USB type. finally my pc was able to connect to internet!