This is primarily for Lexmark printers or it’s counterparts ( eg: Dell printers based on Lexmark platform) .
In both cases we have to navigate to the following key :
HKEY_LOCAL_MACHINE > SOFTWARE > MICROSOFT > WINDOWS > CURRENT VERSION > RUN
Take a look at the right pane , if you are a lexmark user look for anything that says Lexmark and delete that . If you a Dell user look for anything that says DELL AIO and delete that.