If you go to
iamnotageek.com there is a forum especially to help people work through problems with their systems. Jholland on that site has helped me numerous times. She gives you actual steps to complete, and checks often to tell you what to do next. She's fabulous and gets my OLD computer running like new every time I go in to get a "checkup". Read the sticky at the top of the forum that says, "read me first" or "before posting for help"...something like that. Great site...they are very dedicated.