[wix-users] failing to elevate privileges on Win 10 - WiX 3.9r2

[David Burson]

Hi,

I have a colleague running Windows 10, testing my application.  When he
tries to install my application he does NOT get a UAC prompt, the installer
fails, and the log file includes this:

[190C:5294][2016-09-28T17:43:56]e000: Error 0x80070020: Failed to launch
elevated child process:
C:\Users\Dan\AppData\Local\Temp\{91da9c8a-d362-4609-be08-5f648f4ee8fe}\.be\MapCreatorSetup-x64-1.5.0.exe

[190C:5294][2016-09-28T17:43:56]e000: Error 0x80070020: Failed to elevate.

[190C:5294][2016-09-28T17:43:56]e000: Error 0x80070020: Failed to actually
elevate.

[190C:5294][2016-09-28T17:43:56]e000: Error 0x80070020: Failed to elevate.

If he right-clicks the installer and selects Run as Administrator, he gets
the UAC dialog, clicks Yes, but does not have to enter his password.  Then
my installer works.

His experience is identical whether he tries to install with his admin user
or his non-admin user.

His UAC Settings are set at the default, second from the top (“Notify me
only when apps try to make changes to my computer (default)”).

I’ve tested on 3 other Win 10 machines and cannot duplicate the problem -
my installer works as expected.  Any idea what could be causing the problem
on this one Windows 10 machine?  My fear, of course, is that when I release
my app lots of other people will have this problem.

Thanks,

David