I installed Windows 10. Everything works fine - with the exception of the display drivers. I have two (2): ATI Radeon HD 4200 driver; and AMD Radeon 6600M and 6700M series driver.
I installed amd-catalyst-15.7.1-win10-64bit - the installation completed - but did not change the graphic driver version when I checked the device manager. It did not change anything insofar as my graphics capabilities. I cannot utilize a plug-in screen adapter.