How many fonts do I need?

[HALF A PILOT]

I am running Windows 2000 professional, I looked at the fonts and I have 320 different ones installed, obviously many have been installed along with various programs. What is the very least the computer will operate with? thanks

[What_does_this_button_do?]

Five is the answer but Websites and other things you read on line would look awful as your PC wouldn't have the fonts to present it.