[burtonsnow8]

all of those are necessary except mobileshell, but since you are most likely running mobile shell you don't want to end that task. For the most part the processes you see running will be necessary, unless its a program you currently have open.

If you are not using bluetooth you can remove bttrayce.exe. repllog.exe is for active sync. If you have both manilla.exe and mobileshell.exe delete whichever you are not using. beyond that you should leave it alone.