Large Font

We bought a brandnew GATEWAY / w/98 a year and a half ago…..Someone in our house decided to use the CD Writer to copy/burn many songs onto some kind of mini cd. When he was finished….the font was very large and the graphics on the desktop very fuzzy …. we still have internet connections. We called Gateway they sent us some drivers and we installed them….and we installed the Gateway CD/support….Any suggestions….