Thanks for the info.
I've always thought that MS should clarify, and make it more public, the limitations of an OEM version of Windows, including level of support, and if possible, impose more stringent terms on the OEM manufacturer.
Other things which the public should know include the fact that the OEM Windows is tied to the single machine on which it is installed (so that you can't legally install Windows on another machine even if you decide to ditch the old machine).
The other thing is that the OEM manufacturer may or may not provide the end user with a full Windows installation CD. Some provide it, some do not, and some provide it only with extra payment, and some provide a Recovery CD which restores factory settings only, meaning losing all data. The lack of a Windows CD is terrible when it comes to repair.
It would be far better if these things are standardised (as far as possible) and publicised.
I have no quarrels with OEM Windows limitations themselves - as those Windows versions come cheaper - but the public should know what they are paying for and make an informed choice.