There's a report of a similar problem in Trac:
http://www.reinteract.org/trac/ticket/87
I just tested on an XP install (with Python 2.5.2) and it seemed to
work fine for me. What you can do to debug is what I mentioned on the
trac report:. Open a console window and then run:
<install_location>/bin/Reinteract.exe
and if Reinteract is failing with a Python traceback, then it will be shown.
- Owen