The computer crime becomes equivalent word for different invasions in different computer systems of indviduals and legal persons. The reason for invasion must not be only money but also threat message, a warning to citizens, an obstruction of company's operational system. Whatever the reasons are, the number of different computer attacks such as hacking, computer sabotage and software piracy is on the rise. Because of these advents, every EU member country takes measures for protection against the computer criminal, what is very demanding regarding the virtuality of computer world. The consequences of computer criminal are large as they make damage to trade, competitiveness, innovation and global economic growth. It gives a reason to different companies to allocate money for computer criminal prevention and education of the employees because a lot of mistakes are the result of human weakness. An online survey on computer security and protection among the working population has been done, and it has indicated a certain degree of ease in accessing computer crime protection. The aim of this thesis is to identify harmful phenomena in order to protect the life and health of people-workers and protection of material goods.