Two steps to try.. (You can pick or choose what you want
to keep.)
1) Look into clearing out your Startup folder
(Start\Settings\Task Manager\Advanced Tab\Advanced
button\click on the + next to Programs, and clear out the
Startup folder. This will clear out a few of the items
that start up.
2) look in:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersio
n\Run
There are usually a ton of programs that start up there.
Now remember, that's the registry, you should only be
there if you know what you are doing.
Good luck.