I recently installed Acrobat Reader 8.0, Itunes, and Nero 7 Ultra Edition. Between these three programs they added 7 processes that automatically start with the computer. I went from 29 processes to 36.
IMO when a program installs it should ask the user for their preference. I wouldn't mind if it defaulted to the added processes and even stated if you don't know what to do, say yes. Most programs add their extra start up crap so that the program starts faster, index files, checks for updates, or whatever. I want a little check box in the install that lets me turn that crap off. Or even the ability to turn it off in the preferences. You shouldn't have to edit the registry to turn this stuff off.
By the way, everything runs fine after turning it all off, just takes a little longer for somethings to fire up, but not much longer.
Note about using Itunes: it does the thinking for you and kind of automatically syncs the Ipod. I kept looking for a sync button, and had an overwhelming desire to drag and drop a file somewhere. Even the kids had trouble with it, I think they, like myself, are too used to using windows programs.