Laptopor desktop computer ?
you should also check all leads
Test all leads that attach to your hard drive including electrical extensions,IDE,SATA
the leads from your ((motherboard to your hard drive)) make sure they have a secure dust free connections and are not faulty or just replace them they might be faulty
a computer needs its power and data to travel through every working device and to continue its cycle and to have an end so any faulty leads will end up with a computer error
also
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 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