It isn't clear that the person who gave her the CD-ROM was really a
friend.

Your friend's first effort should be to try reinstalling Windows on
top of itself, and when given choices, she should tell Windows to use
the older files, not the newer ones.

However, this reinstall may not correct the problem, in which case,
your friend will have to reinstall into a new empty folder.

Your friend will need a Windows Startup Disk. She can obtain a Windows
Startup Disk at:

http://www.bootdisk.com/

She may also need to activate the CD-ROM in DOS. Here is how to add a
CD-ROM driver to the boot disk. The boot disk might be either drive C:
or it might be a Windows Startup Disk that you can insert into drive
A:.

The CD-ROM driver will normally have a name with the letters CD in it
and it will have the extension .SYS. One way to get a CD-ROM driver is
to run the installation program that came with the CD-ROM. Also, you
can usually get a driver from the web site of the companmy that made
the CD-ROM. Or you can search your C: drive for *CD*.SYS.

Using Notepad or any word processor, make a text file, name it
CONFIG.SYS and add it to the boot disk.  This file should look like
this, but with the name of your CD-ROM driver in place of
CDDRIVER.SYS:
DEVICE=CDDRIVER.SYS /D:MSCD000
DEVICE=HIMEM.SYS

Add a copy of MSCDEX.EXE to the boot disk. You can get MSCDEX from the
folder C:\Windows/Command.

Using Notepad or any word processor, make a text file, name it
AUTOEXEC.BAT and add it to the bootdisk.  It should look like this:
MSCDEX.EXE /D:MSCD000

Bill Starbuck (MVP)