For the nube, leaving it alone is probably the best advise, but for us tech's, Black Viper is a wealth of information.
I used his advise to disable 24 services in XP and about 40 in win-7. There's just a pot full of services that 99% of folks will never use or need in a million years. Stick with the services mentioned in the "SAFE" column.
It was pretty easy to find all the services I wanted to disable and then write them into a batch file.
It takes only about three seconds to run that batch file to disable every redundant service in the OS.
I have one for XP and one for Vista/Win-7.
Using MSCONFIG is great for minimizing the number of things starting up with Windows, but not good for
disabling services. For that, you need to run "Services.msc". (for tech's only)
* I've found that Windows 7, right out of the box, only runs at about 30-40% efficiency, due to all the overhead and SAFE defaults. It's a jungle in there!
Cheers Mates!