See
http://support.microsoft.com/kb/918165 "Problems in Windows
Explorer or the Windows shell after you install security update
MS06-015".
If you aren't comfortable with editing the Windows registry
yourself, then go to
http://www.kellys-korner-xp.com/xp_tweaks.htm and scroll
down to Item No. 383 "Hewlett-Packard's Share-to-Web software -
Fix". Download and run the script to automatically modify your
registry as described in KB918165. You may need to temporarily
disable your antivirus program in order to run the script.
Uninstalling the
http://support.microsoft.com/kb/908531
(MS06-015) update from Start | Control Panel | Add or Remove
Programs will leave your system unprotected against the issue
described at
http://www.microsoft.com/technet/security/bulletin/ms06-015.mspx
.. And if automatic updates are enabled on your computer, then
the update may be reinstalled automatically.
It is anticipated that Microsoft will release a revised version
of the MS06-015 update on Tuesday, April 25.