Fellow MVP Bill Vaughn pointed me in the direction of a Seattle Times article talking about contracts, fine print, licences etc.

OK fair enough, they go on to say:

Increasingly, companies use contract terms to impose severe obligations on customers, often to a ridiculous degree, said Walter Olson, senior fellow at the Manhattan Institute.

Some examples:

Software in cars' GPS displays requires you to click through disclaimers while driving, before the map appears.

Cruise-ship agreements call on customers to resolve any dispute by flying at their own expense to the cruise line's .

Provisions waive the right to trial by jury, or agree to arbitration in a venue unsympathetic to customers.

A prohibition on criticizing a product, such as in the license to Microsoft's Windows Vista software.

Hang on a minute. I've read the Vista EULA, I don't remember anything like that in it. So I read it again to make sure. Here's the closest thing I could come across:

9. MICROSOFT .NET BENCHMARK TESTING. The software includes one or more components of the .NET Framework 3.0 (“.NET Components”). You may conduct internal benchmark testing of those components. You may disclose the results of any benchmark test of those components, provided that you comply with the conditions set forth at http://go.microsoft.com/fwlink/?LinkID=66406. Notwithstanding any other agreement you may have with Microsoft, if you disclose such benchmark test results, Microsoft shall have the right to disclose the results of benchmark tests it conducts of your products that compete with the applicable .NET Component, provided it complies with the same conditions set forth at http://go.microsoft.com/fwlink/?LinkID=66406.

Their standard .NET benchmarking legal speak they've had for years, only this time it ships with the OS and so is included in the licence agreement for Windows. Read what it says, it's about .NET benchmarks, not Windows Vista, and that if you publish benchmarks of .NET, Microsoft shall have the right to disclose benchmarks of your own competing technologies if they so wish.

Let's have some more accurate reporting Seattle Times, there's nothing about users not being allowed to criticise Windows Vista in there.