Here some important benefits includes of using Antivirus software:
1. Antivirus software is secure your data from being corrupted, which will save you a lot of time and effort.
2. Antivirus software can speed up your computer
3. It safe and secure your shared networks from virus attacks such as Trojan Horses.
4. Antivirus is most important because it can save you a lot of money as well.
5. The software does this by blocking computer viruses with their antivirus protection features.
No matter how carefull you use your PC or laptop, you still need a proactive protection to safeguard your computer from malicious attacks. The best way is to have anti-virus software installed to detect and removes viruses.
Agree with you friend that's why I always update my antivirus software and some time virus attack my PC because of upgrade antivirus software it will remove the virus before he will completely attack my files. Antivirus is the best option to protect your system from viruses.
Not all antivirus programs play nice. Of course anyone up to date on the best freeware knows right now Avast and MSE(Microsoft Security Essentials). are your best bets and they are both free. And I can tell you as a matter of fact. They play nice together. MSE is a bigger recourse hog if you run it on older PCS. But any PC made in the last 2-3 years shouldn't notice. For Malware everyone should be using Malwarebytes.
If your prudent PC nerd. Avast with Malwarebytes for good protection and performance. If you only want to run 1 and be secure. I'd say MSE since it also checks for malware.
For true security. Don't go places or download torrents that aren't highly reputable. If your constantly finding stuff. Also, keep your PC up to date.
Personally I hate AVG. If might be a good program but it does not play nice it was a resource hog and is a ***** to reinstall. Norton is terrible. More dangerous than most viruses cause of the false sense of security.
That is MHO on Anti Virus as a user of many years with fair experience with others PCs and experimenting with my own mixing and matching programs.