So, since my roommate is constantly snooping on my computer, I've lately taken to pressing [Windows]+L to lock it out, but the thing is, I want a snarky message to appear instead of just the login screen. I don't want to shell out $10-30 for a seperate locking program, and using it as a screensaver doesn't offer me the ability to just hit the keys to lock it (as far as I know). Is there any way to do this?