Alright, lets sort this out. Your Mom needs to go back to the second hand place and tell the guy she wants her money back. PERIOD.
Selling a pc that is so old and decrepit it uses circa yr 2001 AGP technology
(and cheap even then)graphics whilst running a windows 7 licence is a clear mislead of machinery age.There is no way that is acceptable to the general public. It is blatently taking the Rise and a refund is due.
A bigger con could not be purportrated Cheeses. That graphics card is the same age as you are.