[wix-users] Difxapp and minor upgrades

[Phill Hogland]

I would look at the setupapi.dev.log.  
Are you using the DiffxApp extension?
Does your updated driver install properly by doing only the steps that the MSI is doing, manually without using MSI, such as by right clicking on the INF file?

If doing a minor update of specific driver files I would think that would break the driver's code signing on the INF file, which would be one reason that the OS might load an older driver with a better driver rank value.
https://msdn.microsoft.com/en-us/library/windows/hardware/ff546225(v=vs.85).aspx

I have never tried to do a minor update of a driver, just major updates of complete driver packages, but I would validate the driver update process using only INF tools, without using MSI before integrating the changes into a MSI package.

-----Original Message-----
From: wix-users [mailto:wix-users-bounces at lists.wixtoolset.org] On Behalf Of Hannu Napari
Sent: Wednesday, September 09, 2015 10:21 AM
To: wix-users at lists.wixtoolset.org
Subject: [wix-users] Difxapp and minor upgrades

Hi,

I seem to be having some problems with drivers and minor upgrades on Windows 7, 8, and 10. The drivers in question are network filter drivers. If I create a minor upgrade package, the sys-files in system32\drivers are not updated correctly. After the upgrade the old versions of the sys-files are present, not the updated ones.

The logs (MSI, setupapi) show no issues during the update. The driver files in system32\drvstore are updated as expected. Uninstallation works and it will remove the sys-files from system32/drivers as well. Also major upgrade works as expected.

Any ideas where to look for the cause of this problem?

Regards,

//Hannu

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