GoldenDeath, Go to the link below and under the letter "T" (Taskbar) click on "Minimized Programs Missing" and download the ...taskbar_desktop_fixall.vbs file then run it. It should correct your problem.

To use the VBS Files: Download .vbs file and save it to your hard drive (you may want to right click and use Save Target As). Double click the vbs file. You will be prompted when the script is done.

NOTE: If your anti-virus software warns you of a "malicious" script, this is normal if you have "Script Safe" or similar technology enabled. These scripts are not malicious, but they do make changes to the System Registry.

It's a reputable site and probably the best XP site on the Internet.