Wing's suggestion will work, but is a little drastic, an 'If all else fails' solution !
Since this is not your computer, you can create a Win 7 repair disc from here :
So long as you have a CD/DVD burner and an internet connection the process is quite easy. Just note that the repair disc comes in two flavours - 32 bit and 64 bit - you need the 32 bit one going by your post.
If this doesn't work, and there is no obvious reason why it shouldn't, then you want to try to salvage her data before doing a factory default re-install, unless she has everything fully backed up already. And there are very few of us in that virtuous position ! A good tool for this is Puppy Linux. You create a CD with this on it and it will boot the computer off the CD without any reference to Windows. You will then be able to copy her data to an external hard drive before you go ahead with Wing's more drastic solution.
You can find Puppy Linux here, along with instructions on how to use it :