- What you mean by "error". Do you get BSOD? If you do, what error message it displays when you get it?
- Did this problem start occuring after installing new AMD graphic drivers and Catalyst Control Center?
- How do you know it is atikmdag.sys that's causing it? I mean have you used software like Nirsoft's BlueScreenViewer? If not, download it and post what it says. Or any software that displays mindump files (=crash logs).
I may be able to help you, I just fixed my BSOD issue with atikmdag.sys which started to occur after installing gpu drivers and Catalyst Control Center. I have AMD A8-7100 Radeon R5 & AMD Radeon R7 M265 & Windows 10. Different gpu than yours, but if the problem is the same, I hope I can help.