Software for backup, anti-virus, and maintenance

[nickkelbackk]

I am writing this post for my dad. He is wanting to back-up all four computers on our network. This includes a HP laptop, a Dell desktop, a Dell laptop and my custom desktop. He also wants the software to do anti-virus and maintenance. I have a 640gb WD hdd in my computer that is doing to have everything backed up to it. Is there any software that will be able to do this? Thank you.