I activate user fast switching, but after working for awhile it turns off and I get error msessage try again if it still does not work please reboot.

Hi TJDVO, Thank you for posting your question on Windows Vista Forums. This is a Windows Vista support forum but and it seems that the issue is with the Microsoft Windows XP machine. I would recommend checking Windows XP specific resources: http://www.microsoft.com/windowsxp <Link to Windows XP home page> http://windowshelp.microsoft.com/Windows/en-US/usingwindowsxp.mspx <Link to Windows XP Help and How to> http://www.microsoft.com/windowsxp/expertzone/newsgroups.mspx <Link to Windows XP newsgroups> Regards, Ashish Gupta Microsoft Support