On msn messenger, how do i block someone from contacting me who is already on my messenger list?

if they are already on your list right click on their name and choose block.

Right click on them in your list and there should be a block option. Or there will be one in the msn conversation, red circle with a line through it.

Remove them from your list

click block or you can delete them

I had that, try deleting them, then when they say something it might say block in the conversation window... but I haven't tried it yet so...

on your msn list, right click on that person and down just a bit you will see the option to block, then they always see you as offline and cannot msg you

block or deleate n block,coz there is a option if u right click on the name

U right click on their name and click on 'block'

right click on their name and select block contact