I am logged on as administrator in Windows 7 Ultimate x64 and I show
New>Text Document everywhere I look, including C:\, C:\Program Files,
and C:\Program Files (x86). (Yes, I tried to see if they actually worked.)
I also use Win 7 Ultimate x64 and I think my experience differs from yours.
When I open Windows Explorer and select Computer in the left pane, when I
right click on C: in the left pane, New has entries for Folder and
Briefcase. Without changing focus in the left pane, right clicking on C: in
the right pane brings up a context menu without New at all.
Next, if I select C: in the left pane and right click on C: in the left
pane, New once again contains entries only for Folder and Briefcase. Right
clicking in an open area in the right pane brings up a context menu that
includes New and a slew of entries.
With C: still the focus in the left pane, right clicking on any of the
folders in the right pane brings up a context menu that doesn't include New
at all, including folders that I have created, so it isn't limited to system
folders.
Selecting Program Files, for example, in the left pane and then right
clicking on Program Files in the left pane brings up a context menu that
includes entries for Folder and Briefcase. Right clicking on an empty space
in the right pane brings up a context menu that includes New and a slew of
entries. Right clicking on any folder in the right pane brings up a context
menu that doesn't include New at all.
My summary: the right click context menu changes according to the context,
just like it should. I don't know if I added anything to the discussion or
merely stated what everyone already knew, but where you right click has a
lot to do with which menu items you see.