homealone,
Thanks for your advice.
Relatively certain that auto sense is set - but something to check. Have been reading other posts and articles - and have seen discussion on MTU, which i have not currently set.
Am also going to have a look at NAT - which is enable and NAT filtering which is not enabled as other options.
Am having a really bad week with NTL - the main reason for the SACM was that since the new year, my 3Mb service dropped to effectively 1Mb, via Samsung STB. Had repeated engineers out to check.
Got a feeling that it is either the router - gone U/S or something in Windows, as previously running SAFE MODE with networking (not through router) was giving me 7Mb - really good for the STB - but did not find this out until after had ordered the SACM.
Will have to try SAFE MODE + Network through the router to see if it is WINXP - but the other two machines (Windows 2000) - still have same problems.
The whole time sharing thing has only started since the SACM though.
Anyway thanks again - back to trying more things.
Cheers