I have a laptop Toshiba Satellite P50T-B-112; with AMD Radeon™ R9 M265X and 4k resolution. I recently upgraded my windows 8.1 to Windows 10 and my computer crashed, it entered into a booting loop and did not work (after the automatic update that windows made). After some issues I re-installed windows 8.1 from scratch and it keeps not working, so there seems to be a problem of compatibility of the newest driver with the operating system. I have another graphic card that enables me running the computer with the AMD disconnected but I have lost my 4K resolution. I would really like someone to give me a solution regarding this graphic/driver issue. Cheers.