SC Tom wrote:

I'm assuming you mean the box that pops up after you hover your cursor
over the item in the task bar, and not the info one that pops up for a
second or two. If it's the 2-second-box, I got nothing :-)

I believe those are called balloon tips (or by users just tooltips) try

[HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre nt
Version\Explorer\Advanced]
"EnableBalloonTips"=dword:00000000