Hi, I resolved my problem now.
I have gone to the windows firewall and in the advanced settings, selected inbound,the avast shown 80, and 21 , http and ftp ports and then blocked those ports. I disable the ping options.
Now the avast network scan show, both are safe. I do not know, whether it is temporary fix or not. You need to have a admin changed password and these settings to get avast green ticks.
Now, my question, Would this affect my normal internet experience?
2nd, 2 devices are said to have been connected. one may be my router, the other device?