HP Elite 8300 SFF - Second hard drive not recognized in Windows 10

[KWADublin]

I just purchased an Elite 8300 SFF desktop.  I am now trying to add a second hard drive.  There are 2 open SATA ports (blue and black ports).  There is an extra power connector so connecting the hard drive is easy.  I've tried 3 different hard drives (1 SSD, 1 2.5 HDD and 1 3.5HDD) and none are seen by Windows 10.  

When I go into the BIOS settings and look under storage, each time the system seems to see the second hard drive with no issues.  But when I go into Windows and look at File Manager>My PC, only the main boot SSD is visible along with the DVD drive; the second HDD is not there.  

This same scenario plays out with any HDD I use.  I've tried 3 drives, 3 SATA cables, and always the same result.

If I go into Computer Management utility in Windows and the Disk Management sub-function, the drive is not there either.  

How can I get Windows to see this drive?  The system sees it in BIOS but not in Windows.   Any insights welcome and appreciated.  Thanks in advance.

[pgmDK]

I encoutered excatly the same problem with a HP 8300 SFF and tried the same solutions. I also tried to connect the cable from the DVD drive to the second hard drive, and then Windows 10 could see and read the second hard drive. Then I tried to connect the DVD drive to one of the two other sata ports, but now Windows 10 could not see the DVD drive.  Manifestly Windows 10 can not see a device in the second port of each Sata channel. Solution? May bee a bios update?

I have added a second hard drive in HP DC7900 SFF running Windows 10 with no problems.

Today (12-22-2015) I visited my relative again and updated the bios on his HP DC8300. It solved the problem!

[bln1]

I have exactly the same problem as described in this thread. But, there are no BIOS updates listed for an HP Elite 8300 SFF for Windows 10 Pro OS. Where did you get the BIOS update ?