Most computer viruses come from the countless programs the World Wide Web offers. Each one of them is appealing and tempting for the modern-day consumer. However, a smart consumer knows that before buying (some require credit card payments) or downloading a program, a thorough research must have been conducted beforehand.

Some say that searching for the appropriate programs for your system is very much like searching for the right appliances for your home. That is not exactly the case. The former is more complicated than the latter.

With appliances, there is an assurance of what the product does. Also, there is a warranty. Once, the appliance you bought is not functioning as much as you would want it to, you can always have it replaced or get your money back.

Whereas with programs, you have no idea what the CD can do to your system the minute you put it in. There will always be side effects so how do you gauge the possible risks involved?

The reason why you are resorting to a program is because your computer has needs which you want to satisfy. Nonetheless, some programs cause changes into your system the minute they are installed. You have to figure these out all on your own.

Here are some tips you can apply when buying programs:

1. You must know as much as you can about the program before you download or install this into your computer. The free program offers may be quite inviting but you must be updated on the possible changes it can contribute into your system once you have installed it.

2. There must be a refund/return policy. Do understand these important terms just in case the program you bought does not meet your expectations and standards.

3. Buy from a local store with a credible reputation. Read up on the best place where you could get the program that you need.

Moving on to another situation, what about those programs that can easily be downloaded from the web? How would you know whether these are worth installing into your system? Sometimes, these programs are virus-carriers because of their easy access.

That being the case, these steps can help you determine whether it is worth downloading and installing or not:

1. Ask yourself this: what does the program do? The webpage (when you're downloading it online) or the CD-Rom (when you're installing it on your computer) must clearly state the exact description of the program for the customer's benefit. Learn as much as you can but you must also take into consideration the credibility of the author.

2. Ask yourself whether you are okay with the changes that will occur in your system upon installation of the program.

3. If the author is stated on the webpage or on the CD Rom, the better. In that case, you can contact him via email or telephone and ask about the program first-hand.

4. Testimonials from previous customers are also good information you can rely on when researching on the program. Naturally, they would have experienced what you eventually would.

Some customers go with their instincts. Regardless, they are careful enough to back-up the important files and folders from their systems just in case the program creates a problem and their computers go awry.

There are programs which help you prevent the virus from entering into your system in the first place. It is best that you have this in your computer. But you must also note that there are situations wherein the computer will not be able to instantly recognize a virus.

For example, you clicked open a forwarded message in your inbox containing a virus. Now your computer had a hard time detecting this virus. You may have an anti-virus program installed into your system but these situations still do happen.

In the end, you must always rely on you. Read up on the program you want to install or download. Check on the credibility of the information stated on the webpage or the CD Rom. Contact the author if you can to verify the statements. And always back-up!