I used Mcafee at my office and it killed my computer. Took forever to boot, update and let through a bunch of viruses anyways.
I switched my computer to AVG free at first then got us all on the paid version. Was quicker to boot and more seamless in function. However it let viruses through as well.
Both times it was those viruses that start on boot and take over telling you you have a a virus and to buy this virus protection program. They deleted the other programs locked out the task manager and stuff and were total pains to remove. We ended up wiping one computer and I had to fight way into the HKEY to get the second.
So what i learned no virus protection will protect you against clicking a link or opening an attachment by yourself, this is a major means of getting viruses. You can buy systems that monitor and prevent changes to your registry files and that is the only way to prevent that kind of virus attack, beside just not opening attachments from emails. I used Malwarebytes paid version to monitor registry changes and prevent this kind of stupidity.
AVG-Norton-Mcafee will all catch the garden variety virus on a thumb drive or website intrusion but they can't stop user enabled viruses.
I always liked the free Avast. Never had a problem and I could load it on many computers. Now I am using Microsoft Security Essentials. It is free to download from the MS site. Been using it about a year and have not had any issues.
If your windows is a legit copy, use Microsoft Security Essentials. Also, stop using internet explorer if you haven't already - Firefox is much better overall and it isn't as easy for websites to infect your computer.
Symantec EndPoint (business class) is also pretty good. Most of the others are just resource hogs, even AVG has started adding too many features.
Also as stated above, watch what you click on and what you ok. Be sure to read before clicking. Also watch out for attachments in emails that look like pdf or zip or rar files but are actually exe files. And don't install special video codecs for your porn. ;-)
Think before you click!
Couple more tips. Create a limited account that you do all your use in, and a separate administrator account. This way when something wants to update or install it will ask you for admin credentials. This will stop many of the possible infections, especially since it will make you think about it first. This is how Mac and Linux operate by default which makes them slightly more secure. Lack of viruses created is their other security not because they have less flaws. Most general public buy and use Windows based PCs so hackers target the majority!
IE 9 is actually pretty safe at the moment. Of course hackers target it and Adobe Flash and Reader and Sun's Java. Keep all of those updated, keep Windows itself updated, and run as limited user and you'll be good!
Firefox and Google Chrome aren't any safer then Microsoft explorer. In fact they are worse becaues they have holes and exploits that haven't been patched yet and that your anti virus isn't programmed to protect.
I had McAfee on a desktop and a laptop. I constantly was getting attacked; a virus finally killed my desktop. I changed to Norton and I have not had any problems for a year now. I have been impressed with Norton. I now have a desktop, two laptops, and two netbooks on Norton.
AVG, Ad-aware, and Spyware blaster have kept my puters free of anything since I installed them. All free from download.com.
I also make sure my browser, OS and those programs are always up to date. I manually check every week for updates if it doesn't update automatically.
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