Hi,
Can You tell us what type of computer you have.
Manufacture and model or if it is a home build: then the name of the motherboard manufacture, model etc.
It is almost impossible to guess what is going on, without proper information to begin´n with.
The message:
"No AMD graphics driver is installed, or the AMD driver is not functioning properly. Please install the AMD driver appropriate for your AMD hardware."
It could be that Your graphics card is not properly seated in the PCIE-slot or that you have an insufficient power supply.
Therefore the system cannot properly recognize your graphics card.
Now, I´m just guessing here, since You don't provide us with enough information.
Best regards from Sweden