This issue has been resolved by the author of Win32::Process::Info, Tom
Wyant, for use on Windows 2000 and Windows XP. The module can now be
used with the Windows fork.
When ready, the author will update CPAN with a new version and will note
that a user will code
"use Win32::Process::Info qw{NT};"
instead of
"use Win32::Process::Info;"
If I understood correctly, the said author put in a 'sanity check' code
run at load time for the NT variant, but at execution time for the WMI
variant, so that the WMI, which has what clashes with fork, never gets
loaded.
If you are interested, the thread (no pun intended) for the discussion is at
"[rt.cpan.org #24286] Win32::Process::Info clashes with windows fork"
Thanks to all of you for your help.
Malcolm Nooning