A Virus is Not Being Detected

Hi,

I didn’t know where else to go to be honest, for about 3 weeks now I’ve had this virus (which I think is a virus) which keeps making “blip” sounds then types chinese writing in an area where you can insert text anything from typing a message on this very website, the search bar or even on my sticky notes I have on my desktop, it frequently takes me to random websites and youtube videos which usually have Chinese lettering titled on them. This “virus” is also clicking on my tabs, opening new ones and closing down my current ones, even when I’m editing a video for YouTube for example it will mess around with the software.

A while back AVG antivirus detected that I had 10 trackers after doing a thorough scan, it only detected the trackers on the third time I did it because the first two scan didn’t detect anything at all and this browsing closing, chinese writing stuff was still happening but anyway it managed to remove them and it stopped for a while then somehow it came back and I figured it was because I was downloading mp4 files from this certain website that converts YouTube videos so I can watch them. After just writing that sentence it typed /bn/ and it’s hellish bn/annoying me and it just didbn////////////////////////////////

it keeps doing this bn forward slash thing and no antivirus is detecting it

please help it keep deleting my text

http://forum.avast.com/index.php?topic=53253.0