Vanishing icons

[E.T.]

My nephews rig: Win 98 se.
After system has been up & running a couple hours, the icons on task bar dissapear. CPU shut down seems to be only soultion; reboot restores taskbar icons. A couple hours latter, problem repeats.
Ideas?

[Aku]

Refresh doesn't fix it?

[E.T.]

<div class=\"smallfont\">Refresh doesn't fix it?</div>

..... :o .....I'll check it out.....

*AKU*, your shape shifting powers are running amuck! Soon, your avatar will meld into the psychedelic abyss of the underworld....or not.

[Aku]

I can't help it, I'm a shapeshifting addict.