Use of ANTIVIRUS:

Antivirus software are the most important thing , you should consider for your computer. People who do not use Antivirus software are highly vulnerable to cyber attacks. People think that windows are very secure nowadays but they forget that hackers are very smart nowadays too, they can find loop holes and use them to penetrate inside your Computer. 
Now the question arise, which anti virus to use, this is a very important question and the answer to it is pretty difficult , because of the number of companies that had introduced their software.
Basically there are 2 types of antivirus software
1. FREE
2. PAID

Free:

Free antivirus software are those which are provided free of cost with LIMITED FEATURES, 
Usually the features that are not available in free version are 


1. Surfing Protection
2. Product Update
3. Identity Protection (secure proxy)
4. Advance features
If you are going to use free antivirus software I will recommend 
AVAST or NORTON
 
I have used them in past and both are great.

Paid:

Paid antivirus software are more useful and better then freeware because they provide you MAXIMUM protection and services, you can shop online 100% securely , you can also use their inbuilt proxy to keep your identity secured.
Their are a lot of good , paid antivirus software, you can google it or you can wait for my next article on them.

Remember:

Many people will offer you CRACKED or PIRATED antivirus software, I recommend never to use these, or you can be under high risk, 9/10 of these are actually spyware , which will act as data stealer not a protector..................