Criticism of Microsoft has followed various aspects of its products and business practices. Issues with ease of use, stability, and security of the company's software are common targets for critics. In the 2000s, a number of malware attacks have targeted security flaws in Microsoft Windows and other programs. Microsoft is also accused of locking vendors and consumers into their products, and of not following and complying with existing standards in its software. Total cost of ownership comparisons of Linux as well as Mac OS X to Windows are a continuous point of debate.