There is no graplics driver in my computer.I have Compaq.

ATI noob friendly auto detect tool
http://support.amd.com/us/gpudownload/windows/Pages/aut...

Be nice, he might just be english challenged.

Windows will load a generic driver to your machine that will let you see what’s going on, but you will not be able to operate your computer at full capacity until you get the Compaq drivers, that what I assume you need.

To get the current graphics diver for your older computer, go to the Compaq website, support downloads section. If the site lets you, enter the serial number and model number of your computer. The websit3e should be able to give you a list of all the drivers that your computer came with, and the most recent updates for those drivers. Download the files to your desktop and double click on them. They are self extracting.

Please give the exact model of your PC if you want us to find the right drivers for you.

The best way to get the drivers is usually from your system manufacturer (check on the HP website since you have a Compaq). Just go to the "Support & Drivers" section:

http://www8.hp.com/us/en/support-drivers.html