The Windows Genuine Advantage (WGA) test tool has been enhanced by Microsoft in order that it can detect PCs that are not using a properly licensed version of Windows. Alerts will then be sent to millions of users of pirate software in countries all over the world.

The alerts read: 'This copy of Windows is not genuine; you may be a victim of software counterfeiting' and include a link to a web site explaining what people with pirated versions of Windows need to do.
Seemingly, the only way to stop the alerts from appearing on a regular basis is to replace the pirated version with a genuine copy.