Windows 7 64 network dropping out!!! please help

[Syrix]

I have recently installed windows 7 64, The problem I am getting is that it keeps disconnecting from the internet and when that happens I can not even get to the router by typing in the router address it just hangs.

I have a Nvidia nforce 780i motherboard with latest drivers, i have not installed the network controller manager

I have tried disabling the IPv6 and disabled the side scalling in options

Also I have given my Pc a static IP address on the network

I have also disabled the windows TCP autotuning in CMD

The problem keeps happening sometimes its 30mins or a hour and other times it can be within 5 mins of booting up, to bring back the connection I have to reboot my PC, as disabling then enabling my router/network it still won't connect

I have also tried uninstalling the nvidia network drivers and letting windows 7 install its own but still it drops out, the icon in the tray says internet access but it does not connect to webpages or email.

Also sometime i play a online game and it stays connect i tab out and try a webpage and just hangs , but the online game is still going ?, i close the online game and webpages still dont work


Please please help me as I am running out of solutions to try, many thanks!!!!

 

[Syrix]

right I think I may have sorted it

I was able to ping my default gateway and also ping websites with no lost packets.

I uninstalled AVG and rebooted and tried again, at the moment no dropped connections

My attention came to AVG as when i was surfing the web i checked my email and AVG started it's email scanning then my email suddenly stopped receiving , checked the websites and no connection so I think AVG was blocking the connection for some reasons.