Microsoft says one of its efforts to crack down on people who use pirated version is the Aero graphics engine in Windows Vista. According to the software giant only those running genuine Windows will be able to take advantage of the Windows Aero user experience.
The move is the latest salvo in Microsoft's broad attack on those who use unauthorized copies of its operating system. In the fall of 2004, Microsoft began testing the Windows Genuine Advantage program, designed to verify that a particular copy of Windows is legitimate.
At first an optional program, the piracy check eventually became mandatory for many types of Windows XP downloads, but was not required to run any aspect of the operating system itself. Microsoft has identified reducing piracy as a key way for the company to grow its sales of Windows, which is already used on more than 90 percent of personal computers.