|This sort of problem is going to be painful to diagnose. I'd suggest:
- Start with a fresh Win7 VM;
dcomcnfg, and look at the various settings under "My Computer ⇒ Properties ⇒ COM Security";
- Install the application;
- Look at the COM Security settings again, and try to work out what's changed;
- Upgrade to Win10;
- Look at the COM Security settings again, and compare to the values from before the upgrade;
(You might need to do this from a remote PC if you can't open
dcomcnfg on the upgraded box.)
Alternatively, you could use something like Process Monitor[^] to monitor the installation to see what it's doing.
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