Maggie:

To boot into Safe Mode:
To start Windows Me in Safe mode, press and hold down the CTRL key while you
restart your computer, and then choose Safe Mode on the Windows Me Startup
menu.  Some users have found this doesn't seem to work for them and have more
success in using F8 rather than the CTRL key.

To replace rundll32.exe:
You can replace rundll32.exe with a new copy from the Win Me cab set.

Rundll32.exe is contained in WIN_17.CAB of the Win Me cab set and can be
restored using MSConfig | General | Extract File ... and following the
prompts.  The "cab" files are in the Win9x folder on the Win Me CD and/or in a
sub-folder of Windows\Options.  See MS  KB129605 - "HOW TO: Extract Original
Compressed Windows Files" (http://support.microsoft.com?kbid=129605).

Alternatively you can use System Restore and roll your system back to before
this file was deleted.

Regards,
--?
Mike Maltby MS-MVP
mcmaltby@hotmail.com