When I disconnect or log off via Ctrl-Alt-Del, the final closedown dialogue states other people are logged on to my computer when I'm the only person using it. Margaret Nicol
I don't have a good answer for this, but the possible implications are worrying: your PC may have a "backdoor" Trojan that opens it up to hackers. The Task Manager invoked by Ctrl-Alt-Del has a tab marked Users, so check to see if any other users are logged on. Also, click the Performance tab and look for activities that are not obviously the result of things you are doing.
Even if you don't find anything suspicious, run an online virus scan at Housecall and download and run Ewido to see if you can find and remove any backdoor Trojans.
Finally, install a proper firewall, if you don't already have one, and block connections if you don't know what they are for. (You will need to research the less obvious ones.) Zone Labs' Zone Alarm is one free option. Of the paid-for firewalls, McAfee is powerful and easy to use, though I'm not a big fan of the rest of the suite.
Backchat: "Margaret Nicol is not alone in getting messages about other users when switching off," writes James Prentice. "I get this from time to time for no apparent reason. I have come to regard it as just another bug in SP2!" Bob Evans says he also gets it on his new Dell. But it remains a mystery.
