NTFS Permissions on terminal server

I have a windows 2000 terminal server that I am locking down by limiting user permissions on c:\, c:\winnt, c:\program files, c:\document and settings. Most of the permissions are read, or read and execute. The users are receiving the following: "you are not authorize to use the selected printer" when sending a print job. I know this is a permissions problem, but I do not know where. Can someone help? Thanks.