Livingston, who publishes the Windows Secrets newsletter, said that a single change to Vista’s registry lets users put off the operating system’s product activation requirement an additional eight times beyond the three disclosed last month. With more research, said Livingston, it may even be possible to find a way to postpone activation indefinitely.
It’s amazing that this can be accomplished with a single registry hack. Does Microsoft even review their own documentation? This hack can only be used with earlier versions of Vista, as recent versions seem to have this "exploit" patched up. It looks as though the business versions will retain the feature, however.
Source: Computer World