Think about your competition and what they are offering. Since you mentioned the big store chain support services (Geek Squad, etc..) your site has to be on par with theirs or else it make’s you look like a little mom and pop shop just starting out fighting against the giants. You want your customers to view you as being established and having the knowledge and experience to fix their computer needs. Of course your prices may be lower, but will the quality be any better than the big chains? You have to convey that message instantly on your website.
I like the idea of the site, but you may need a different template or another design to shout "professionalism" the moment a visitor arrives. Include pictures..Maybe of your shop if you have one, or whatever, but you need more than a bee graphic. Utilize graphics / pictures which can relate what you do. (you can find many royality free photos online). Make them have a connection to come back to your website, even if for nothing more than to "look" and be proud of who`s fixing their computer. People love to be associated with those deemed "successful".
I agree with the others, about you stating some of your qualifications (A+, MCP, Exchange...) you get the idea. People have to be confident that you can actually fix their computer, or else they will just pay the extra money and take it to the "big store geek squad". Also, give them an estimated turnaround time, maybe that can be your biggest selling point against the store chains, that you can diagnose their problem within "30" minutes using your “specialized” diagnostic software. That doesn’t mean the problem is fixed in 30 minutes but that you recognized what the problem is and how much it would cost to fix it. Most customers will gladly pay for your services if your turnabout time is quick.