Currenlty I am using AMD A8-3510 MX APU with Radeon(tm) HD 6620G. I have recently recently installed windows 10. After the installation of windows 10, all drivers are updated accordingly. But graphics driver didn't work. Error response "No AMD graphics driver is installed...........................". So, I downloaded driver from official site HP as I didn't find it in AMD driver site and uninstalled the previous driver using DDU in safe mode and installed the new one. But the problem persists again.