Windows on a partition BSOD's within a minute of startup after Windows Update iMac, 27 inch, mid 2011, 3.1 GHz Quad Core i5, AMD Radeon HD 6970M

BSOD error message: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (igdkmd64.sys)

From what I've read elsewhere this seems to be an issue with the Intel Integrated Graphics Driver (Intel HD 4000) But disabling the driver still causes the bug because igdkmd64.sys is still present. At one point I had deleted igdkmd64.sys and disabled the driver which stopped crashing but videos wouldn't play either. The two might or might not be related.

Has anyone else had this problem and found a solution to it?
At first glance, I am wondering why you are using an HD 4000 driver for an AMD Radeon HD 6970M chip.

Have you tried downloading and installing the AMD Drivers?

http://www.amd.com/en-us/products/graphics/desktop/6000/6970