Hi,
I have the same issue.
It happen only in 1.5, 2.0 works fine.
I removed 1.5 open beta and installed 1.5 from scratch but no luck.
My machine's specification is much like CXCdemo1's: i5, gtx970(single) and Windows 10 with all the drivers updated.
The logs and the dxdiag are attached.
Thanks Logs.zip DxDiag.txt