it seems that the computer in my dad's office keeps getting viruses; it's a pretty old computer, but i think it runs windows vista. my dad wants to replace the computer with a new one but i'm not sure if that would be a good solution. what do you think? i wonder if it's due to the user (his secretaries use it) or the actual system or both. whenever it gets a virus, he tells me to fix it and i always put antivirus on it after reformatting it.