After I start a computer, everything is OK, the Internet connection works... after some time (ten minutes to hours) the connection suddenly stops. Then I can not access the web, I even can not ping to local DHCP, DNS, gate etc.
No errors, everything act normal but the wired LAN does not work.
I tried almost everything, turn off an anti-virus, turn an off firewall, reinstall both... no success so far.
The only thing thats help is a full restart.
I am afraid that is a HW problem and my warranty ended few months ago...
I will be glad for any suggestions.
Lenovo SL500c (nV 7300)
Win 7 Pro installed from scratch only with necessary drivers (and Lenovo Care bullsh...) but I don't think the problem started immediately after OS re-installation