Well it was a better day for gardening than for upgrading IE!
Actually, IE upgrade was fine but McAfee VirusScan broke. During the reboot, Windows announced that "WebScanx.exe has generated errors and Windows is closing the program etc, etc." Won't go away.
WebScanX.exe (Ver 4.5) is a McAfee program and without it there is no protection from web viruses during connection. Basic System scan is fine.
IE 6 Uninstall worked OK and McAfee (Ver 5.21) is back to normal.
Neither MS nor McAfee address this problem in their FAQs or Tech Support info. Almost certainly a DLL incompatibility; I'll wrestle with it and get back in case someone else may benefit. I'll start with taking out McAfee, reinstalling IE 6 and reinstalling McAfee.
Damn computers!
[ 15 October 2001: Message edited by: fobotcso ]