hi,sometimes we experience bad feelings about other users of your computer see programs recently opened by you..you may remove the "recently opened programs" icon from start menu but that doesn't do a fair job.Because Windows will store the recently opened programs in history folder under Documents and settings directory.Any user can access this folder by typing "recent" in the run command box.To get rid of this..do a simple tweak in "Microsoft management console".
STEPS:-
1.Start>>Run>>type "gpedit.msc"(without quotes)
2.This will open the console..on the left side,under "user configuration>>administrative templates>>click on "Start menu and Taskbar .
3.On the right, you will find lods of settings..find "do not keep history of recently opened documents" then double click.
After this tweak windows will not store history of any recently opened programs.