a lot of user profiles in doc/settings on the Sharepoint server

hello all,

I have a question:
first the situation:
1 Sharepoint Portal server
1 Domain controller with AD

The users that have access to our Sharepoint portal are located in AD on the DC.

Today i checked the folder Documents and Settings on the Sharepoint Server and there are a lot of user profiles here (222 folders)
All these folders are +/- 3mb.

In total there are more then 222 users.

My question is: How is it possible that this userprofiles are copied/created into the C;\Documents and Settings folder on the sharepoint server.
the users never logged on this server (only on the sharepoint Portal)

I hope some of you guys have an answer for me.

Thanks