New
#11
We discovered that if Bitlocker is in use and you have this GPO enabled on your computer:
Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Disable New DMA devices when this computer is locked
then once you upgrade to v1709, any computer with a wifi adapter seems to be completely unable to use any networking at all (even the Ethernet adapter is inoperative). We reported the issue to Microsoft. Removing the GPO setting (i.e. setting it to 'Not configured') resolves the issue and v1709 works fine after that point. Since an affected computer can't get on the network to consume the updated group policy, a reimage is required (unless you want to find the reg keys that the bad GPO settings applied and try to remove them... I didn't bother).
It was an Intel site, not Microsoft, that had this info:
https://communities.intel.com/thread/118750
Good luck!