Sorry if it sounds like chickening out but I have a healthy respect for tinkering with msconfig - and how it can screw your system if you get it wrong. If msconfig tells me "Access Denied"then I just leave well alone. If I want to tinker with my start programs then I'll use a third party program like Winpatrol or Startup Inspector both of which will allow you to just disable,rather than remove,startup entries.
rawprawn - thank you, but I tend to subscribe to cocteau48's cautious approach to tinkering with anything down in the bowels of Windows! I don't feel sufficiently expert/confident to poke about down there.
cocteau48 - good advice, thank you. I've got WinPatrol on my computer already.