Should i purchase an antivirus or download one from the internet?

I tired Avast! but it didn't work

Should i purchase an antivirus or download one from the internet?hp

It depends if you want good protection, if you do get NOD32 or Kaspersky (they're the best). If you want a free anti-virus I recommend in this order (install only one):

1. AVG Free

a. A simple interface (easier to use than Avast! and Avira)

b. Can detect about 82.82% of viruses

Cons: low virus detection

2. Avast!

a. Real-time protection

b. It has an option to delete a virus once found

c. Can detect about 87.46% of viruses.

Cons: Too many icons and confusing user interface

3. Avira AntiVir

a. It can detect malware better than Avast and AVG

b. It's cute umbrella icon

c. Can detect about 94.26% of viruses

Cons: A very sluggish update

Should i purchase an antivirus or download one from the internet?mcaffee

Avast and AVG are terrible

Buy Kaspersky!!!
Purchase to get a CD.
protonic.com has a boatload of free downloads that have been tech tested and approved. Check them out!!!
I highly recommend purchasing a copy of a reliable vendors product (like Mcafee) from your local PC store (like Fry's).

If you are already infected with a virus and this is why you are saying "it's not working" then you may have a virus that is resistant to anti-virus, disables anti-virus, and/or is what's called polymorphic (changes to avoid detection)... or you could be reinfecting yourself too.