I recently installed the Pinnacle Studio version 11 upgrade and found this while while going through the ReadMe file:

7. Windows XP: Switching User During Capture. Never do this. Very bad things will happen.

Sometimes though I think that being a little too succinct with warning messages can have just the opposite effect of the one intended.  When I saw that I immediately thought...  Maybe I should give it a try just to see what happens.  To me, this warning is about the equivalent of you mom telling you not to do something and when pressed for a reason says "Because I said so that's...