Her current one is unacceptable and it can't run any program, whether it be Microsoft Word 2005 or the built-in games. It's a very old system, from 2000 or 1999.
We're willing to build one, she doesn't want a top of the line extreme gaming machine, she just wants something that she can use for basic applications.
She wants it to be fast, at least for her. Budget is 400 dollars.
go please
Please use PCPartPicker or Newegg links / other websites.