Forum Moderators: phranque
start -> all programs -> (select appropriate) -> uninstall
or
start -> control panel -> add or remove programs (don't just delete the program files folders!)
or
start -> control panel -> administrative tools -> services (stop the service)
or (last resort)
ctrl+alt+del -> task manager -> manually close appropriate applications/processes (be careful)
I'd use crt+alt+del right away to see which instances are still running, to let you know how to handle the situation accordingly. Other than that, the methods above should work fine :)
Good luck!