Hi Andreas,
See if this helps:
Restore Taskbar,Start Menu and Desktop (Line 117)
http://www.kellys-korner-xp.com/xp_tweaks.htm
Restore Taskbar and Desktop to Default Functionality (Line 164)
http://www.kellys-korner-xp.com/xp_tweaks.htm
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.
/top10faqs.htm