Name not Available in Volume Mixer after opening League of Legends

So everytime I open League,http://puu.sh/or6qA/276967224b.jpg. After I close League, that turns into http://puu.sh/or6sd/b3c7b4400a.jpg Now I don't know if its my problem, you know a virus or computer. Or if its a problem with my League client. Those "Name not Available" doesn't play anything, they just stay there, and its like annoying to me because I don't know what they are. If anyone can help then please hit me up.