Download the program called Unetbootin on to another computer and pop a flash drive in (empty one or one with stuff you don't care about on it)
http://unetbootin.sourceforge.net/
Then from the distribution list, I
think NTpasswd is the one you need? never fiddled with it before. Pretty sure that is what it is for. Then you just pop that flash drive in to the computer in question, pick it as the boot device (either press Fsomething for boot selection if it is an option OR go in to the bios and set the flash drive as the first boot device. Sometimes the option is hard to find or not even there on really old computers).
Another option would be to burn the thing to a CD, but unetbootin is so much easer
![Wink ;)](./images/smilies/icon_wink.gif)
you just pick what you want from the drop down, pick your flash drive from the drive list, hit go, and have a beer.
Alternatively if you just want her files, pick ubuntu from the distribution list. Then you have a portable operating system on a flash drive that you can pop in to any computer and grab files from. Another option is puppy linux, its not nearly as complete or user friendly as ubuntu but its a lot smaller and has persistent save files (while you can copy files to the flash drive ubuntu is on to rescue them, any changes you make to the Ubuntu OS wont be saved).