My father told to me that his PC has turned on by itself. I have no idea about what this can be, and this has never occurred before. After this, he turned off the PC and I checked my router, and seen that his PC was sending (but not receiving) few packages even when turned off.
I would like to know if this packages (even in a very little amount) are normal when a PC is turned off.
Besides that, my father is not concerned about security, so I installed a firewall one month ago, and a few days ago I noticed that some connections from his PC to multicast addresses (like 126.96.36.199 and 188.8.131.52) is being blocked buy my firewall, but I blocked inbound and outbound connections from/to these addresses in my father's PC, and today I checked if this configuration stay fine and it looks fine.
Any ideas of what could I do? Both Malwarebytes and RogueKiller reported nothing.