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If you are one of unfortunate users still forced to use the Internet Explorer, consider installing this temporary patch from Determina:
http://www.determina.com/security_center/security_advisories/securityadvisory_march272006_1.asp
Just do not forget to reboot your computer after applying the patch, the installer seems not to insist on it. If you can not reboot the computer, then at least close all IE6 windows to get rid of the vulnerable copies in the memory.
The patch is nice and clean. It does not modify the system files on the disk.
If you continue to use IE6 by inertia, consider switching to another browser. Diversity is good for security.