Hi, as far as im aware there isn't a fix.
Have you updated to the latest LAN dirver? that plus the complete shutdown and unplugging like you are doing may help temporarily. The other option would be to an add in lan card in., Sorry i couldn't be of more help
Thanks For suggestion,
I had a conversation with intel excecutive on online chat. He suggest me to update bios and lan driver. and i applied.
now it is working fine.