Windows 10 1909 Wix bootstrapper

I have developed a Wix setup which is started by a managed bootstrapper wich also installs some prerequisites. Everything works fine until the Windows 10 release of version 1909. Everytime I press theinstall button the setup hangs up. The logger displays these last lines.


Log:

[1A3C:0E38][2020-01-27T13:23:22]i201: Planned package: VC12Redistx64, state: Absent, default requested: Present, ba requested: Present, execute: Install, rollback: None, cache: Yes, uncache: Yes, dependency: None

[1A3C:0E38][2020-01-27T13:23:22]i201: Planned package: MainSetup, state: Absent, default requested: Present, ba requested: Present, execute: Install, rollback: Uninstall, cache: Yes, uncache: No, dependency: Register

[1A3C:0E38][2020-01-27T13:23:22]i299: Plan complete, result: 0x0

[1A3C:0E38][2020-01-27T13:23:29]i010: Launching elevated engine process.


If I click twice on the hanging application it crashes completly. There is also a error in the event log but it is not really useful. It only says that the application hanged up.

I have found out one interessting thing. This only appears when I have turned on the UAC. The level doesn't make a difference. Only if I turn off UAC completly it works as excepted.


Has anyone a explanation for this behavior? If I use a earlier version of Windows 10 there is no problem. Has Microsoft changed something in Version 1909 concerning a installer?

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