During surfing the ISP (Tesco) software suddenly crashes. The PC is left unaffected. This happens more during the day, and less in the evening.
Norton antivirus software is up-to-date and shows no viruses. I do not have a Firewall installed. OS, XP, updates are up-to-date. Internet provider is Tesco, have said they will get back to me and have not. Any suggestions on how to cure this problem would be appreciated.