Anti-virus software and computer

PC came along, I'm not after only about 30 years.
Will got better how the performance of the PC in the meantime.
I have asked that the contents to be treated because we are sophisticated, computer performance will always increase.
Say to the computer virus threat such exists.
Previously, it was from a recording medium, modern viruses have become easily allow penetration through the Internet.
The importance of anti-virus software will come out there.
Anti-virus software because they always check the virus, we will be using some of the processing power of the PC.
Sometimes if the capacity of the computer is poor and the load becomes large.
Manufacturers have produced anti-virus software has been devised to reduce the load on the computer as much as possible like.
Would happen slow enough users still worrisome.
When you select the anti-virus software, it is also important to choose in how much load is applied to the computer.
The more and the more load function.
Of course, it is not a problem to high-performance personal computer type.
It is unlikely that a virus is detected from a computer in everyday life actually.
However, it is also true that in the news in the newspaper incident has happened several times in the year.
I am not necessarily tomorrow would not be myself.
I believed you need anti-virus software in the sense that with an ounce of prevention is worth a pound of cure.