Yes you can, but you might have problems accessing files in the Users directory. Try setting the security settings so that "Everyone" has all access. If that doesn't work, you might try pulling the drive, putting it in an enclosure, and booting off it (via USB) from the laptop. Windows will probably bitch about how your hardware has changed significantly, but if you can get it to boot, you can change the permissions on your mom's user profile folder and therefore be able to access the files from another installation of Windows.