I am also having intermittent networkconnectivity issues. I have a Vista PC running on the same router and do not see the problem repicated so I don't belive it is due to the router. I have tried running both static and dynamic IP addresses on the NIC, but it doesn't seem to be relevant to this case. I have run a continuous ping to my default gateway which is the router (Not the modem) and see that eventually my Pings timeout. Sometimes the self repair tool fixes the problem but oftentimes I have to disable then re-enable my network adaptor. Last time I disabled the network adapter it disapeared from my list of network devices completely and I had to restore to a backup point earlier in the day.

Hello Eyal1,Could you provide some information on your hardware and drivers?

hi,please try to update your drivers. and install your up to date drivers manually...regards,Mumin CICEK | Exchange - MVP | www.cozumpark.com | www.mumincicek.com

Try uninstalling the driver from device manager and then see if Windows updates it for you.