All I am saying regarding the 6 series Intel® motherboards is that the driver version to be used depends on the processor installed. So, if you have a Sandy Bridge, the correct version is 15.28.20.64.3347. The driver version ending in 3345 is for Ivy Bridge or Haswell only.
In regards of the Intel® DH87MC, I may suggest a Windows* System Restore for the time being. I will report the issues you have described.