(This is probably a noob question, but I've been looking through the EVGA forums and Googling for a while and can't find the answer.)
 
Just installed new GTX 1060 video card today, model 03G-P4-6160-KR.  Installed latest NVIDIA drivers from EVGA's website, and latest Windows 10 updates.  Everything works fine so far.
 
Then installed Precision XOC.  Moments after launching an error shows up: "The code execution cannot proceed because d3dx10_43.dll was not found. Reinstalling the program may fix this problem."  If I click OK in the dialog box, the error message repeats over and over; sometimes noting other missing DLL files: d3dx11_43.dll, and d3dx9_43.dll.  (I understand this isn't a problem w/Precision XOC, because apparently it happens all the time with various games and other graphics programs.  It's probably a Windows configuration error on my system?, i.e. maybe just missing some DLL files.)
 
Note that DirectX 12 is installed, and DxDiag seems to indicate support for older DirectX, i.e. versions 11, 10, and 9, is already installed as part of DX 12.  Any advice on how to "add" the missing DLLs to my DirectX 12 installation?  I have the DxDiag.txt file if needed.
 
Should I just go find DirectX 11 at Microsoft's website and install it alongside DirectX 12?  And then likewise w/DirectX 10 and 9?
 
much thanks!

bob16314 for the win!
 
I went to [web page address deleted] and installed the "DirectX End-User Runtime Web Installer".  Apparently I was missing all kinds of DLLs, and the web installer got all of them.  Everything is working now, Thanks bob!
 
(For people who might be reading this post in the future: The [web page address deleted] link is good as of June 2018, but if it has changed then a Google search for "DirectX End-User Runtime Web Installer" should find it.  Also, the installer program only mentions providing updates for DirectX 9.0c.  But it also updates DirectX 10 and 11, even though it doesn't specifically mention them.  I'm not too sure about DirectX 12...in searching for the solution to my problem yesterday, I think I saw a comment somewhere that DirectX 12 is ONLY 'update-able' by using the Windows Update utility built into Windows 10?)
 
- Steve
 
P.S. -- @bob16314:When I originally installed Precision XOC, a UAC dialog popped up asking, "Do you want to allow this app to make changes to your device?"  I clicked Yes, naturally, and I thought that meant the installer was elevated to admin privileges at that point.  Nonetheless, I uninstalled Precision XOC and then reinstalled per your suggestion - doing the "Run as administrator" thing at the very beginning.  Oddly, the same UAC dialog popped up. I clicked Yes, and the re-installation proceeded as normal.  The 'missing DLL' problem was unaffected, and that's when I took your other advice and got the DLLs from Microsoft using the runtime web installer.
 

mrvortep
Just posting to say I got this error after a brand new EVGA 1080 install (no previous card or gpu software). I did as suggested above and it works great now (I didn't have to reinstall Precision XOC).

Glad it also worked out for you too. Nice to see one fix help multiple people. Good job Bob.        

Often it’s a good idea to go to the Microsoft site and download the latest DirectX files. For some reason Windows Update sometimes doesn’t have the most current versions or for random reasons things are missing. At least it’s got better then it was under Windows XP.