I've always found the following link very handy for figuring out what to do with those cryptic startup progs:
http://answersthatwork.com/Tasklist_pages/tasklist.htm
And to remove them from starting up, execute msconfig and go to the last tab. Uncheck the progs you don't want to run.
Oh and do yourself a favor and download
The latest Ad-Aware and
SpyBot Search & Destroy.
Feel free to PM or post if any of this is unclear to you.
As to your question about learning about computers, most computer savvy people will NOT tell you they learned from a book or class. Most of them learned from personal experiance; fucking around with their comp and asking people that already know. That's really most of the fun of working on/with computers, the 'AHA!' moments.