Hello. Got a old HP notebook, it's a APU A4-3305M. Made a clean install of Windows 10 CU 15063.296 and windows updated both gpu drivers, with Catalyst and switchable gpu options. HD 6480G Version: 15.201.1151.0 Date: 08/21/2015 ID: PCI\VEN_1002&DEV_9649&SUBSYS_1860103C&REV_00 6600M Version: 15.201.1151.1008 Date: 11/04/2015 ID: PCI\VEN_1002&DEV_6741&SUBSYS_1860103C&REV_00 Catalyst version: 2015.1104.1643.30033 The problem is that i'm getting a long black screen before logon screen, arround 5 minutes. After that it continues. I remember having a similar issue with Windows 8, but at time i just downloaded the latest catalyst from AMD and it fixed. But now i don't remember with catalyst version it was that come it both drivers. Any other solution? Thanks.