[brytlea]

I am pretty stupid about this stuff. Would you know if your computer was a zombie?

[ShadowAce]

Would you know if your computer was a zombie?

Yes. It start moaning for "brainzzzzz"

[mmichaels1970]

Would you know if your computer was a zombie?

It would go "coin Coin COIN!"...just kidding, bit of Scooby Doo humor never hurts.

Run a malware scan on it. Like from malwarebytes.org or trendmicro.com.

If your computer is grinding, especially when you are on the internet. If you receive tons of spam or popups, then you can be reasonably sure you are infected with malware. Just because you pay annually for a product like McAfee doesn't mean you're safe. I recommend a routine scan with a free tool like the ones I mentioned above to stay as clean and secure as possible.

[a fool in paradise]

Did it vote for Obama?

[Billthedrill]

Keep your antivirus current and run a free malware check from time to time and you’ll be fine. Watch for unusual disk or network activity - lights on your router (if you have one) when you’re not expecting them. Maybe it’s Microsoft or RedHat updates; maybe it’s some clown using your box to mail porn or do a denial-of-service attack. You’ll get lots of suggestions on this thread, I haven’t a doubt.