|Make sure the resolution it set to the Optimal or Native resolution your LCD display is supposed to use. If that's set wrong you can certainly have a black bar or two black bars beside or above or below what is displayed. |
RIGHT click on a blank part of your main desktop screen, choose Personalize, then Display Settings. You can see what the resolution is set to and change it there.
If you don't know what that's supposed to be set to, look up the specs for your laptop or netbook model, or if you tell us which make and model you have, we can look that up for you.
Tell us the make and model of your brand name system.
The specific model of a brand name system is often shown on a label on the outside of the case somewhere, or it can often be determined by going to the brand name's web site and loading a program they have available, if Windows is still working, on the subject computer.
If it's a Dell computer...
Go here for how to find the Service tag "number":
Tell us what it is.
If it's a HP or Compaq computer.....
Scroll down a bit.
Look for the similar label on the outside of your computer.
Quote the specific model number - that's at the end of the first line.
Quote the Product number - that's on the third line.
If it's a Lenovo computer
Find your specific Product number and tell us what it is:
Finding my product number