emie writes:

<<when he uses his browser to get to the Internet from Desktop, his screen
blanks out and replaced with a yellow screen.  Also, he described his cursor
dropping down to the bottom of screen when this happens.  He has to shutdown
to get out of the yellow screen.>>

Sounds to me like a prank he's inadvertently downloaded. Hitting Esc might
kill it.

If so, chances are that it's put itself into the startup chain. Run
Msconfig and he may be able to identify it from there and then eliminate
it. Otherwise, it might be a slow and painful process. Presumably he's
updated and run both Spybot and AdAware, though that's a long chance.

Don Penlington
 From the beach at Surfers Paradise.
http://www.geocities.com/donaldpen/
for sunny Queensland photos, fractal art, free computer tutorials, and more.

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