You cannot as W98 has no such feature.  You can restore the registry to
one of the five backed up copies; however, this does nothing for file
changes (system.ini and win.ini excepted).  Your best bet is to post the
problems here.  Post the *exact* error message(s) and what was going on
when it/they appeared.  If there is a details button, click it and post
that message verbatim--the registers are not required.

--
Regards

Ron Badour, MS MVP W98 System
Tips:  http://home.satx.rr.com/badour
Knowledge Base Info:
http://support.microsoft.com/default.aspx?pr=kbinfo