I have Windows XP Professional with Service Pack 2. I have fast user switching enabled. I understand there are some compatibility issues with 3rd party applications, when using fast user switching. But I also have Microsoft Office 2003 Professional. I would assume Microsoft has all of their products up to date. But whenever I switch users, and try to start up Microsoft Word or Excel or any of the programs, I get a prompt that says certain .cab are not installed. If I click cancel enough times, it goes away and the programs start up. Anyone know the cause of this? Just a side note, I also use Nero 6 Ultra Edition with InCD. I get similar errors, when I switch between users and Nero always fails.

Thank you in advance for all of your help