WARNING.
I just got through cleaning my laptop from all the spy and malware that cam with QQ international.
There is a search result on yahoo that looks just like the QQ site...But nooooo! it will download and install a bunch of bad stuff and then ask to reboot. DO NOT RESTART YOUR MACHINE. That will give them user account control. Go immediately to the control panel and uninstall all the crap that just got installed before you restart your machine.
If you are searching for QQ international and end up at Download366..com RUN AWAY