I am not good with computers, but we just brought our computer in to get repaired. It has been great, but now our images are fuzzy. How do I get in to change the frequency to make it good again? Thanks!

Ummm?? Do you mean the resultion is low? What Operating System are you using? I have no idea what you mean by "change the frequency"

What exactly is fuzzy? Is it the whole screen or just pictures on the net or what?