On the C7 install trouble:
Yes, everything is up to date on my computer and I installed C7 as usual on my XP system. What went wrong next, according to DAZ, is that Zone Alarm was running (as always!). This was not unusual, but that is their only explanation for the fact that the only way I can run the program is with the administrator ID. Uninstalling the security is only for the initial install of the program, to be turned on again afterwards, but this has never been required before. Supposedly Zone Alarm continues running in the background, even when "turned off".
DAZ says no one else had such a problem as mine (!) There are times when you don't want to be special ;)