Posted 10 July 2009 - 02:26 PM
To be honest with you, I have never heard of fonts slowing down a computer. Personally, I would just leave the fonts on their just in case you do need them. There are the more popular fonts, then there are the less popular but still some people do use them. And if they use the font in some type of document and you don't have the font, it will show up weird for you.