Windows 8.1/10 Hates QMI... Ideas anyone?

[dl5162]

@KiernanV

Ok well i gave it a go but no luck. Interesting enough, i found the Registry section pertaining to Sierra Wireless software, however i have tried installing with various parameter combinations but none of them seem to be able to prevent Windows from switching the modem. So i have a sneaky feeling the entry responsible is elsewhere in the registry somewhere. I’ve exported the section of my registry to a text file for those that may be interested, and perhaps someone else might see the solution where i might have overlooked it by accident?

Strange. I see

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Sierra Wireless Inc\DriverInstallOptionsUsed]
“DisableUsbCompAutoUpdate”=dword:00000000

in that file. Did you not set this option for this install?

In any case, I believe those settings are exactly what the section name suggests: Simply the settings used by the installer. The registry settings used by the installed applications and drivers are spread over per-application sections. When I tested this on Wine, I also got a setting like this:

[HKEY_LOCAL_MACHINE\Software\Sierra Wireless Inc\SwiService\UsbComposition]
“DisableAutoUpdate”=dword:00000001

which I believe is what should make SwiService run without updating the UsbComposition. The odd thing is that I don’t see any UsbComposition section at all under SwiService in your registry dump. Have no idea why. Maybe it’s hidden somewhere else, or maybe something went wrong.Or maybe I’m just completely wrong on all of this. That’s definitely possible… I’m unable to test this on a real Windows install with an actual modem.