|Your description of the case is too generic.|
It's likely it's a generic case, but it might not accomodate installing either of both uATX and ATX mboards.
".i know your going to say just buy another one but my mom wants hers fixed."
If it's the PC Club computer you're trying to fix, the chances are very good that whatever is wrong with it can be fixed for no money or minimal money, if you're willing to supply some effort and time.
However, you need to describe all the symptoms of what is wrong in as much detail as you can come up with.
Apparently PC Club went out of business in 2008 and their web site disappeared about that time too.
"PC Club was a privately-owned, United States-based chain of computer hardware stores established in City of Industry, California in 1992. The company closed all its stores on July 29, 2008. PC Club operated primarily in the west-coast states. It offered hardware and peripherals for PCs, as well as complete desktop and notebook computers assembled under the "Enpower" brand name."
However, if you. or we, search the web with the Enpower model number or model name that's probably on a label on the outside of the case, there may be detailed info on the web about the specific model, e.g. in a review.
E.g. search for: PC Club Enpower EN......
or PC Club Enpower (whatever),
or Enpower (whatever).
If you supply the model number or name, we can search for you.
If that doesn't help, it's likely a retail mboard model was used that we can look up.
The model, sometimes the make, of the mboard in a generic or relatively small volume brand name system builder desktop system is usually printed on the mboard's surface in obvious larger characters, often between the slots.
If you see that, quote it.