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OK, let's try a few things. First, do you have an antivirus? That might prevent start of the executable. Start the Task Manager, then start the game. In Task Manager, look for lupus.exe, whether the process appears at all or whether it is terminated. In case AVirus program is messing it, you will have to put the executable in 'allowed' exceptions.
As of DX, Win10 should have already DX9 components, you can try just in case this link- (scroll a bit down, there's a download button). DX installer will determine if anything is amiss or reinstall if anything is damaged (it won't mess up your current DX), watch for the message what it tells you and report back.

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Game runs perfectly after disabling antivirus temporarily. Thanks very much.

Oh, thank Hefns, and there I thought I would have to call the 'olde Gods' for support as I was starting to worry. :D

Well, glad to see it works, but make sure to open your AntiVirus program and put Lupus.exe in Exception list (they all have some, sometimes called 'Whitelist' as well) so you don't have to repeat the disabling operation every time you start the game.

Have fun!