Solved Canon MP520 Screen Display Issues

Definitely try reinstalling the software that came with the printer. Or better yet, check on canon’s website to see if they have newer versions of the drivers for your version of windows. If that doesn’t work, your only option is to contact the manufacturer and have them fix it, so long as it is still under warranty (although if it is over 2 years old, probably not). Other than that, you are probably out of luck.