There are several possibilities. First, your QQ was stolen and used to do bad things. Second, your computer card has been QQ. If you can't respond for a long time, it may be. . . .
Suggestion: What version of QQ do you use? If I used to use 2008. Now I am in 2009 or 20 10 version, which may change. ...
Reinstall the original and it will be OK.