Yeah, on the Start Menu...right click the unwanted icon/link to the program, and "delete" it. Empty the recycle bin afterwards. That rids the link.
Then for the access to programs/folders, well, if you're on a NT file system you can restrict users' access, else use a program from here (these are pretty basic, but they work. Note: this won't stop someone from coming in by DOS outside of windows, or anyone who's really into getting that data (hah)):
"Hide Files and Folders" lets you either password protect or just hide the files (being searchable/useable) while it's active...to disable it, you just enter the password and tell it to do so.
I think those do what you just said! If not, let me know...!