Seems like you downloaded the wrong AMD driver for your Windows OS by error 184:
Go to the link KingFish gave you and download the correct AMD Driver for the Windows you have on your Laptop.
I suggest you FIRST install Lenovo's AMD Driver for you laptop and see if your GPU is recognized and working correctly from here: AMD VGA Driver for Windows 10 (64-bit) - Lenovo Z41-70, Z51-70 - US
Here are all the Lenovo's drivers for your laptop from Lenovo Support: laptops and netbooks :: lenovo z series laptops :: z51 70contentdetail - US
Also for the latest AMD driver to work correctly your Intel APU Graphics driver and Intel drivers MUST BE UP TO DATE and the LATEST.
By the way, Make sure you have the latest BIOS & CHIPSET for your laptop installed.