Howdy GlasgowDave.
In reality the prefecth is there to help speed up the starup. It keeps all your files in order. Usually when you have some type of malware etc we like to clear it but usually you dont have to. Below are a couple of programs to help
http://grc.com/stm/shootthemessenger.htm (shuts down messenger for good.
http://www.majorgeeks.com/download.php?det=664
Will Help with Bootup time.
Have you defraged latley this will also cause starup to slow down a little.
Edit: After looking at the items you listed you can disable all but ctfmon.. The others are for your extra keyboard buttons.. If you dont use like the volume button on the keyboard it is safe to disable them.