How do I block msn messenger?

Question

I do not want people using my computer to use msn messenger, if I uninstall it they install it again, so how could I block it?

Answer 1

1 make guest account

2 make it so they cant download c**p

3 make a password on your account

or

4 don't let people use your computer all they do is **** it up anyway

Answer 2

If they are doing that, I wouldnt let them use my computer.*