from: Toms Hardware

Although Microsoft has gone to further lengths than ever to ensure that as many Windows 7 users as possible are using genuine copies of the software, there always will be those pirates who find ways around the system and illegally profit from the sale of copyright infringing software.

To combat this, Microsoft will soon be rolling out a new update for Windows Activation Technologies which will detect more than 70 known and potentially dangerous activation exploits.

Microsoft detailed the pending update on the Windows Team Blog, and warns that "Searching for, downloading, or installing activation exploits or counterfeit software on the Internet is risky, because sites that advertise these pirated products often contain malware, viruses, and Trojans
, which are found bundled with or directly built into the activation exploit or counterfeit software." 

The update will be rolled out next week to users of Windows 7 Home Premium, Professional, Ultimate and Enterprise editions. It will also appear on Windows Update as an Important one at the end of this month.

Microsoft also points out that this update is completely voluntary and users can decline the update when it appears. Of course, if a hack or exploit is found, Windows 7 will alert the user by removing the desktop background and pop up periodic reminders of just how non-genuine it is feeling.

I would think the windows 7 update service will be updated to detect whether you have the update or not....if you don't have it it won't download any further updates until that update is installed.