Can some1 plz help me?!

I have a problem. When I played online games, I figured out it’s a bit slower, and I get some lag that’s freaking me out. I looked at my ‘Active Connections’ panel in Comodo which tells me what pulls my internet, and it shows that cmdagent.exe is transfering something all the time. The transfer is ‘IN’, not ‘OUT’, so it looks like it’s downloading something, I don’t know what, also don’t know where. It’s not related to my anti-virus updates, because I allready did that. Can someone tell me how to block it? And for the last hour, it has downloaded 50Mb…