Hi kuya Dom, i guess the virus didn't got from internet coz of AVG installed maybe from removable device, right now here it's been famous using removable device such as mp3 player,MP4, phone memory card etc...there are virus spread out here in such devices that AV can't detect sometimes esp. when they forgot to update..So if they fix it advice them not to use some removable device that may harm the pc or teach the user to scan first before opening the device.
I hope it helps
cheers,
Leah