[Difference between anti virus and firewall?]

Hey

I have problem regarding antivirus and firewall. I installed avg antivirus on my pc, but virus attacked on my system again, somebody told me to install any firewall. I am using cable internet. Can anyone help me with the difference between anti virus and firewall? Thanks in advance.

[What are some of the problems with windows vista?]

Hey guys

I want a new laptop, think about a hp. but all the laptops from hp have windows vista. I am used to windows XP and i have heard that vista has many problems, but what kind of problems? also how often do they occur? should i choose another laptop without vista?

[Difference between Nintendo DS and Nintendo lite?]

Hey

I wondered what the differences between Nintendo DS and Nintendo DS lite was. Aren't they the same? Is the lite one made with glass instead of plastic? List as many differences as you can! Thanks for any help.