Sorry to write again to Windows 8.1 but I'm desperate! I have a Sony Vaio with a graphic card Mobility Radeon HD 4000 series and Windows 8.1 64 bits updated the last week.
I can't use Catalyst to change the graphics. I have searched in the page drivers to this card but is impossible install.
So I want to know when is possible have this driver to solve the compatibility problem.
This notebook worked with windows 7 and Sony in his page has only the driver to Windows 7.
please is very urgent!!!