Have you tried asking her to stop? Often times a simple direct solution is best. Otherwise, get her to chip in for the replacement cartridges if she's going to be printing a lot of stuff.
It's just too easy to bypass XP's permissions if you know what you're doing, so you can't really rely on them.
I'm talking about a printer hooked directly to my computer via usb
Os: Windows xp pro.
I'm trying to stop a user/sister from blowing all my ink of worthless crap...i swear she can sniff out that new ink cartridges were loaded.