NEC POWERMATE 2000 Service And Reference Manual page 158

The Fix OS restore option attempts to restore the Windows operating system as
it was shipped on your system. If you updated any of the applications that
shipped with the system, such as Internet Explorer, the Fix OS function might
display a series of error messages. If error messages are displayed, move the
error message windows so that they are not layered on top of each other. Click
the OK button to continue the Fix OS restore process.
A-12 PM 2000 Series Release Notes