I have this network issue with windows7 on a laptop, the connection suddenly drops, sometime at laptop->modem, sometime at modem->isp, sometime both. The ADSL modem is on autodial and become DHCP server, should be plug and use for pc.
I believe this is not modem/router problem, but with windows7 itself. Reason is the modem settings is never touched, the win7 is new pc however.
My previous winxp pc have no such problem, connection lasts almost forever/weeks without unknown connection drop.
I also notice, win7 sometime did not detect the net cable plugged in, even if i tried it multiple times/disable/diagnose. Resetting the router/modem or reboot win7 and it will. Manual IP also doesnt solve the problem. Laptop has been open once for display replacement, could this have effect on net card ? If so, how come i still able to browse ?
Is there someway to solve this ?