Windows 2000 Everyone share

In windows 2000 professional machines there is always a default everyone share on the C drive. I have checked and with that everyone share on you cannot get to the C drive from a remote machine unless you know the password, which is good that is what I want, but is still seemes scarry to have an everyone share on. I talked with lots of people and they say if you remove that everyone share on c root windows cannot talk to itself and will cause pagefile.sys errors. If anyone can explain this Iwould sure appriciate it.