Microsoft announced recently that all unauthorised copies of the latest Windows 10 operating system will be permanently marked with a stamp on the desktop. A warning with advice about the illegality of the used copy will be permanently present. Such a step was very much necessary as, only a few months ago, Microsoft created a lot of confusion by saying that all current (illegal) users of earlier Windows would become eligible for a free upgrade to Windows 10. Later, Microsoft added to this statement, saying that those who would like to upgrade from illegal copies of earlier systems, would have to go through the purchase process within the online Windows Store. According to Microsoft, pirates will enjoy very attractive terms in order to become legal users of certified Windows 10 copies. What Microsoft really wants to achieve is a reduction in use of illegal copies of their products as, while being without regular updates, they expose their users to high levels of vulnerability.