My dad has been having a problem getting on-line with a Dell laptop (XP Pro) and a Sagem modem. He keeps getting a 721 error each time he attempts connection and has tried rebooting many times but to no avail. The ISP is Tiscali who are adamant that the connection from the exchange is sound and suggest that something has become corrupted in the sign-on process. Now whilst we can all pretty much agree that Tiscali is an utterly p*ss-poor outfit that make Talk Talk look vaguely competent and BT semi-professional, it seems in this case that they are correct, as my dad’s immediate neighbour is also a Titscali victim and his connection, although slow, remains trouble-free. In addition to this dad tried the laptop on the neighbour’s modem but it still failed to connect - again with a 721 error code. I got him to uninstall Zone Alarm as there seem to have been a few problems with this firewall (recently discussed on DIYNOT) and use the Windows equivalent instead. This worked for sufficient time for him to send out a couple of emails but on subsequent attempts to connect he continued to meet the 721 obstacle. Next I suggested that he do a restore and this seemed to achieve some sort of connection but any attempt at locating the pointer on a favourite resulted in the no-entry graphic appearing. Trying to connect in Network Connections is continuing to result in the 721 error message. I wonder if it might be worth removing the existing Tiscali stuff and loading the original broadband connection disc to recreate the line. Any ideas much appreciated.