Need more input Stephanie...
What type/age/OS is your daughter's PC? How much RAM does it have?
If it's an old OS then the PC may not handle the new card...though if the PC has an AGP Socket it can't be THAT old.
If there is already on-board video you may need to disable this in the PC's BIOS and remove the drivers for it in Device Manager (if it's XP right-click on My Computer and select 'Manage') and Control Panel Add/Remove Programs.
It may also not have enough RAM...bit hard to tell at this early stage of question and answer

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Two devices have been assigned the same I/O ports, the same interrupt, or the same Direct Memory Access channel (either by the BIOS, the operating system, or a combination of the two). This error message can also appear if the BIOS did not allocate enough resources to the device (for example, if a universal serial bus (USB) controller is not an interrupt from the BIOS because of a corrupted Multiprocessor System (MPS) table).
You can use Device Manager to determine where the conflict is and disable the conflicting device. On the General Properties tab of the device, click Troubleshoot to start the Troubleshooting Wizard.
Mick