Need to post your question and replies in English plus provide all the info kingfish asked from AMD Forum.
You laptop is a x64 bit laptop so you could have install a Windows x64 operating system even though it only has 4 gigabytes of RAM Memory.
The Specs on your Laptop from CNET.com: HP ProBook 4720s Specs - CNET
HP Support has no drivers for your laptop for Windows 10. Only Windows 7 which may indicate your laptop may not support Windows 10 on it. HP ProBook 4720s Notebook PC - Driver Downloads | HP® Customer Support
Here is HP.com with all the information you need on your Laptop: HP ProBook 4720s Notebook PC (ENERGY STAR) Product Information | HP® Customer Support
Need to verify the GPU card installed in your computer. Download GPU-Z (Download TechPowerUp GPU-Z | TechPowerUp ) and run it. It will show the Make & model of the GPU card you have installed on your laptop.