and by using the "services.msc" you have more information at your disposal to decide what you need, what you don't need as well as the choice of Automatic, Manual and Disabled(Stopped)
you do not get these (3) choices by accessing the processes via Task Manager, especially in windows 7 where you can access both the processes and the services, you are only able to stop or start the Services
by using the "Services.msc" route, you can view what other resources/services are dependent on that particular service and what other resources/services that particular service is dependent on itself you are wanting to set up...... as well as it will also tell you what processes that service is launching / using......
I recommend using caution while adjusting your services & processes......
I also recommend to NOT go in and adjust any services &/or processes by way of "msconfig" , this will change your boot up sequence from it's regular normal/default boot up ( start up )
also, some websites which get tossed around this forum religiously are:
www.blackviper.com ( works for both WinXP, WinVista & Win 7 ) and
www.processlibrary.com ----> which will tell you what a particular process is, does and if it is critical, not critical, etc.....
hope this helps