This computer belongs to a friend of mine, it is a five and a half year old desktop - which to date has worked flawlessly - connected to the internet by ethernet to a BT router/modem. I believe the problem lies with the router/modem but before his wife gets into a discussion with BT re routers I want to make sure that it has the latest available LAN drivers installed.
The mobo is an ASUS M4N68T-M-V2 (AM3) and, according to Device manager the LAN adapter is an nVidia nForce 10/100/1000 Mbps Ethernet unit. Device manager shows no errors against the LAN adapter and the Properties panel says it is working normally.
Speedtest.net shows performance jumping around wildly, I ran it several times on ethernet and got Pings around 45 mSec, downloads between 6 and 20 Mbps, and Uploads around 0.03 Mbps (30Kbps !).
Connecting my laptop by wireless Ping was about 40 - 45 mSec, Download was around 20Mbps, and Upload 1.9 Mbps. I then disconnected the ethernet cable and connected the desktop using an elderly and battered USB wifi dongle I had with me and got Ping 47mSec, Download 6.94 Mbps and Upload 1.9Mbps.
I can find nothing on the nVidia web-site that relates to this Lan set-up. There is a chip-set driver on the ASUS web-site with a build date later than this computer's build date. Would it be worth my while installing this (slightly) later chipset in view of the fact that Device manager shows no problems ?