Mama,
This opinion / instructions are coming from a computer no-nuthin so use caution.
But, I do believe "System Restore" is what you're looking for to remedy your daughter's computer problems.
By using this feature, she can "restore" her computer to a date before the current problems existed.
I.e: You developed a problem / problems on 11/17. Remedy - Set the restore date for 11/16.
Voila!