This could be due to a number of problems. First, the hard-drive might have shut down incorrectly. If the problem is indeed caused by the battery, try using a different ac adapter. The one that the laptop had been using might have a bad capacitor. The laptop might also have to be plugged in when its being used. Another problem could be with the RAM on her computer. This is unlikely, but does produce symptoms like this. To fix that, you would have to unscrew the screws on the bottom of the PC. Once you remove the panel, you should see the RAM sticks. Try switching these around. Here is a guide: HP G72 Memory Module Replacement There are many problems that could be occurring. These are just a few that could cause a problem like this. Good Luck!