Some may know that Windows 7 comes with a variant marked 'N' (media player unbundled). Aside from the unbundling, as far as I know, the oporating system is the same in every other way
BUT.....
SharePoint 2010 does not install on Windows 7 <version> N. So even if you install Windows 7 Enterprise N (as I did today) you cannot install SharePoint 2010. As far as I know, there are no work arounds & the issue will be addressed in the RTM
Until then, if you want to run SharePoint 2010, make sure that not only do you install the appropriate version of Windows 7 (e.g. Professional, Ultimate, Enterprise) but do not install the N variant