Any one can make a DOS in the Microsoft Windows Live Messenger <= 8.0.

Steps:
1. go to tools
2. optinos
3. messages
4. uncheck the gestual emoticons

Then you can send
"

























"
Many times, that will couse the consume of 99% of the recourses making a DoS

Solution:
You must leave the gestual emoticons optinon unchecked till a new version of msn come fixing that error