OK, so all your computers are connected to the internet via your wireless connection.

You picked up a virus or worm, that virus/worm then sends a signal to the internet that it's found a host. Since most viruses/worms are designed not to reinfect the same computer with itself it then goes looking for other vulnerable computers, which it no doubt finds by downloading itself via your connection.

Now whether it is a network virus/worm or not doesn't matter, your computers are infected and will remain so until you do something, i.e. disinfect your PCs with an AV.


UK Bob