Above is your present Screen Resolution Configuration.
If it says "800 x 600", adjustment is not required.
Any resolution lower (640 x 480, etc) should be adjusted by following the instructions
To change your monitor settings (resolution & colours), right-click on your computer's "desktop", then "properties". Then select the "Settings Tab" where you can adjust the "colours" and "Screen Area" accordingly.
Ensure your screen resolution is set at to least 800 x 600 pixels and a colour depth of 16 million colours (16bit) or greater.
Once adjusted, more screen area will be available and most websites will display better.