Can't remove program from startup list

From: Ranger (gber_at_goober.net)
Date: 05/02/03 

Date: Fri, 2 May 2003 11:38:41 -0700

Unwanted .exe programs have been downloaded to my PC from
internet sites and have been configured to start
automatically when I boot Windows XP. I can see them in
System Information/Software Environment/Startup Programs,
but I can't figure out how to remove them from the start
list. Before I upgraded to XP, I could remove them in
Windows 98 from the Tools menu but XP doesn't seem to
allow that. How to?