I will try, it seems that explorer does not start and probably because of GPU driver. What i tried is to check registry settings for explorer start with boot and everything seems all right. Maybe this behavior is related to conversion MBR to GPT somehow. Could you try to find references to amdkmdag.sys in registry and delete them and send me that hive to try. I do not have offline registry editor which I can use, it is little bit messy in presenting hives.
