serial I/O install fail -- DLL not found

[Fossil]

Thank you, Ian.  You put your finger on the problem.  As I thrashed
around earlier, I had installed serial i/o pieces before the clean
install pieces of
 pywin32-214.win32-py2.7.exe
 pyserial-2.5.win32.exe
I did a complete de-install and re-install.  Now the serial i/o is
functioning  -- I'm still stumbling along with the typical mistakes of
a 'newbie'.  Thanks again.
Chas.