I've branched this out to a new thread, as it's more effective to discuss the specifics of your scenario, and not carry forward the old baggage.
For completeness, this thread was originally a reply to a similar thread from 2014, here:
I honestly have no idea where that wishlist form goes. It might eventually get routed to us, but my guess is that it's off in some far-removed customer service team.
The best way to get a bug report to the Flash Runtime engineering team is by filing a bug here:
That said, a copy of the installation logs on a failing machine would be really informative.
We're having the same problem with the recently released 126.96.36.199
SCCM claims that it has been successfully installed. Programs and Features claims that it is installed, but there is no plugin to be found.
For us, it happened for both ActiveX and Plugin. One coworker of mine claims he's heard of a problem with this and that it has to do with Group Policy installation. We used to use Group Policy to deploy flash to our users, but a couple months ago we switched to SCCM and the claim is that even though the Group Policy isn't applied anymore. Computers that have previously had flash deployed via GP may have this glitch, but computers that have never had the GP applied install successfully. I haven't been able to investigate this more yet.