OK, the Intel prowin32 executable failed to complete, quoting error 713 and referring to lack of finding the right items. I cannot find help on this error. I noted that despite disabling via MSConfig several items including PC Suite, Bluetooth and Logitech (mouse no longer in use) these all returned, though others such defunct printer Epson did not return. I was minded to check that PC Suite was not the cause as it had been set as a network backup for contacts. However, not only was this setting removed before the problems began, but also I see (when I returned to the forum and somehoe found myself in old pages) that I already tried removing PC Suite by unistallation to see if this fixed the lack of internet and it did not. Next thing is to presumably uninstall bluetooth.