W3SVC - Or, WWW Service. - Errors related to this would be based around your "World Wide Web" service, aka, the service that starts a web server. To configure this,
- Right-click My Computer, Manage, Expand "Services and Applications".
- Under here is where you find config info for that service, and the other you speak of...
SMTPSVC - Or, Send Mail Transfer Protocol. If you're not running an e-mail "server", then you can disable this service. Same goes for the W3SVC service.
As for your startup question, the answer is not going to be as simple as looking in 1 place to find 'what loads during startup'.
The first software I'd use to look into this would be called "StartupRun". This is freeware, that looks in a *lot* of the places I speak of, giving access to open/change/enable/disable what it finds.
http://www.nirsoft.net/utils/strun.html
This one specifically looks at services...
http://www.nirsoft.net/utils/serviwin.html
This one looks at your shell extensions. This is somewhat different then the previous two, as these things load during startup, but may remain inactive until use. A shell extension is nothing more then a method given to your operating system, which specifies what to do in a specific situation.
For example: When you install Winzip, it installs shell extensions which tell your system how to handle certain events, like double-clicking zip files, or right-clicking them. (those context menu's you see added to right-clicks are one example of a shell extension).
http://www.nirsoft.net/utils/shexview.html
Here is another software I use that examines what loads during startup:
http://www.sysinternals.com/utilities/autoruns.html
When you use it, remember to click the 'view' menu, as the default only shows 1/4th of what it can show. (Essentially, there are 4 "Show" options, and only 1 is checked by default.)
Lastly, here is a list of services and descriptions, and if they're safe to disable, or what they do to determine if it's safe to disable them.
http://www.djbdesigns.com/wtvzone/startup.html
There are many lists like this out there... Remember: No 1 tech is 100% right, ever
Hope this helps.
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