Click start control panel administration tools computer management device manager scroll to display adapters + to expand you might see a yellow question mark ? or exclamation mark ! or a red x right click select reinstall drivers
you might have to remove your graphics card to make sure the socket is clean
restart your computer the reinstall it this should activate found new hardware wizard
if your computer came with a mother board disk the drivers could be on it
click start control panel,display,desktop you can select a different desktop from the drop down list
or a browse button where you can select different pictures this may vary depending on your operating system
also settings you can change the settings for more or less pixels or from the drop down list pick the appropriate level of color range or troubleshoot also select advanced then general dpi normal size,larger size or custom settings
always click APPLY after making any changes
hope this helps you
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