What is good: You focus on what you do rather than who you are which is important when you are not a nationally recognized brand.
If we are just talking about improving it, use a different font for "Computer Repair", choose one that is very easy to read. Get rid of the red outline. Red and Black text should never be contrasted against each other. You are OK on your logo, because it is white on red and black on white.
How does it compare against other signage near you, especially if you are in a strip. If everyone elses signs are white on black, do something different. Bright Yellow background or something else that stands out.
How does it contrast with where it is being mounted? If it is going on a white building, get rid of white backgrounds on your sign.
You have text for left brain people, for right brain people you need an image that screams computer. The mouse in your logo isn't enough. People have to think too hard. An illiterate person should be able to easily figure out what you do.