Malware detected need help

During my scan malware was detected but when I tried to put in check I got an error saying that the chest server is not running. RPC error. Does anyone know how to fix this?

What avast version are you using 4.8 or 5.0 ?

Have (or did) you another Anti-Virus installed in this system, if so what was it and how did you get rid of it ?

What other security based software do you have installed ?