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 connection 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 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 settingsalways click APPLY after making any changes hope this helps you
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