I installed a ati radeon 2400 xt graphics card into my computer and i cant seem to find the adapters for this graphics card, and does this support dual screen?
According to AMD page, there might be drivers for your card (if that's what you are looking for) for Windows 7 and Windows 8. If you're lucky, these drivers might work on Windows 10, too.
There is a tool to detect and download correct drivers (if available) for your card.