Did the local shop give you any CDs when you purchased this computer? If they
did, you may find one of the CDs has the driver for your display adapter.
If you didn't receive any CDs, it's time to move on to identifying your display
adapter. Your computer either has an on-board display adapter (monitor connects
directly to the motherboard) or an add-on video card. If you have an on-board
adapter, you need to determine the manufacturer, make, and model # of your
motherboard. That can be done with a program such as Belarc Advisor.
Belarc Advisor - Free Personal PC Audit (Version 7.2x)
http://www.belarc.com/free_download.html
Once you've identified your motherboard you should be able to download drivers
from the manufacturer's support site.
If your computer has an add-on video card you may need to open the case to
determine the manufacturer and model #. I'm not sure whether Belarc Advisor will
provide information for a device that doesn't have the correct drivers
installed.
Post back if you need clarification on any of this information.
Nepatsfan