jivrajaman

Hey guys, i;m usually prety good with computers, but now i really need some help. I just formatted my dads computer because he had a lot of viruses, and within a week he has a bunch of viruses again, and i cant really use it anymore. before connecting the internet, i installed AVG antivirus, and it seemed to be working fine, but as soon as i hooked up the internet the viruses started pouring in.
Last night, i finally formatted my computer and now i am having the same problem, I installed Panda antivirus before hookiing up the internet, and by the end of the night i had a bunch of viruses on mine too.
I dont no what is wrong
the only thing I can think is that I'm using a hub for the networking instead of a router.
could this be the reason i am getting so many viruses?
please help me, I make websites, and I am very busy, but i just cant get my computer to work.


WILL USING A ROUTER HELP STOP VIRUSES?
thanks
aman