Start\Settings\Control Panel\Administrative Tools\Computer
Management(Local)\System Information\Software Environment\Startup
Programs|View|Advanced, then in the "Location" column, you'll find the path
to the "Startup" location either in the "Startup" directories or from the
registry's "Run" keys.
%ALLUSERSPROFILE%\Start Menu\Programs\Startup
%USERPROFILE%\Start Menu\Programs\Startup
You can delete the shortcuts that you no longer want to run.
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
You can delete the string value for the program you no longer want to run.
