These small applications cause problems, destroy data and files in your computer. They may also collect sensitive information so that they can copy your identity and give the attacker access to your money. They spread over devices just like the spread of viruses between people mainly through Internet and electronic e-mail. They can be activated by clicking on any reference on the Internet if you think that required image of Internet page is opened.
The best protection is if your antivirus software contains the latest virus definitions.
Install programs that check e-mail attachments for viruses.
Do not open files from unknown people. Your friends can also spread viruses without knowing it.
Be careful when downloading files from the Internet, look closely at the credibility of the information source.