Howdy:
Depends on what they are running.. First of all, open the program itself.. Most programs have a user option to stop the program from starting with Windows. Just enable or disable as the case may be..
next, take a look in Start>Programs>Startup.. Anything you see in there that you don't want starting with Windows just right-click and delete..
Lastly, as a last resort, go to Start>Run and type in msconfig Now, click on the startup tab.. Uncheck the programs you don't want starting with Windows.. apply and okay out and reboot !!
Murray