1. norton internet security = Avg internet security. 2. kaspersky internet security 3. Bitdefender internet security Norton and AVG download free on my site
Which anti virus (preferably free) works best with windows7 x64. Presently using avast free but boot time scanner does not work in 64bit systems.
I use Avira AntiVir @ work and home and it's very good. Google "Avira vs" and you will find that it's among the best antivurus solutions, and it's free. Although it's only available in 32-bit, it runs fine in x64 OS.
I use Microsoft Security Essentials and am very satisfied with it. MSE recently blocked a trojan, when an infected USB stick was inserted with no infection of the system. I work on Windows 7 x64 and MSE doesn't seem to slow down anything. When I use Spybot for an additional check, it only finds some cookies, not more. For a free AV solution MSE does an excellent job.
I use to be die hard Avira guy. I did at least 10 hours of research on best AV last year and Avira was tops. However, I've been using MSE for past several months and I like it better. The issue with Avira is that there are many false positives which is quite annoying.
Just cause it didn't notify you doesn't mean the definition file had it flagged meaning you might have had it but didn't know it cause it wasn't detected I use avira free and malwarebytes and once in a while it finds something. But never had problems with comp so far