2017 iMac Windows 10 on BootCamp 6 wont shutdown

I have a brand new 2017 iMac on which I installed windows 10 Pro. I installed the Bootcamp support software and for the most part the system works fine - except for one annoying issue: I cant shutdown or hibernate the system, it will only restart. I have done as much research as i could and FWIW -

• Fast startup on windows 10 power settings is disabled.
• Installed and reinstalled Bootcamp windows 10 support software.
• Don't know if this is an issue the Intel Management engine.

At this point i am going to have to remove windows 10 and make do with windows 7, unless someone can help me with this problem. I am worried i have restarted the system so many times already, it may damage the SSD or some other component of my new iMac. Please help. Desperate!!!