It's possible one of the profiles is a bit corrupt. You could create two new
users, and copy the profile data over.
This was written for XP, but it's basically the same.
811151 - How to Copy User Data to a New User Profile: http://support.microsoft.com/default.aspx?scid=kb;en-us;811151
It's also possible you are simply using a lot of apps that take time to
close down. Open Task Manager while you switch, to see what is going on.
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Mark L. Ferguson
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