Steam infected with trojan?

Hi!
Whenever I open steam Avast tells me that the connection to valve909.steamcontent.com (The 909 is actually three different numbers every time) has been terminated due to being infected with VBS:Bicololo-BX[Trj]. This message keeps popping up every few seconds until I exit Steam. After some Googling I found that Bicololo is a trojan but no mentions of the -BX version could be found. Is this a problem with my PC or is it the Valve web servers that is infected?

Any help is appreciated and I apologize for any poor wording or spelling as English is not my first language.
Thanks!

Hello,
sorry for any inconvenience, this problem has been solved few minutes ago via stream update.
If problem still persist please write us.

Thank you!