But you're wrong and ChileanLlama is right.
1) Windows "E" (not "N") was ditched before release and instead all users had a choice of installing a different browser through Windows Update.
2) It was specific to European countries (due to the EU Commission ruling).
3) Windows "N", the one without Media Player, has sold in numbers and is still available from some retailers.
European Commission agreed to Windows having a choice of browsers installed along with Internet Explorer (that you only really needed to install another browser) but they also ruled that customers must have a choice of not using other pre-installed software (Windows Media, etc.) which is why Windows 7 "N" was offered to EU customers.
It's likely that Windows 8 will have a choice of browser again.