Hello Alban,
Thanks for your response. I am aware of the way Windows 10 "upgrades", sorry for using the confusing terminology
The Windows Update driver update is disabled in our corporate environment, so the DisplayLink driver does not get installed via Windows Update.
We use the method you describe, 1607 "upgrade" is ready, then we run the RS1 MSI, so the TH2 MSI is left untouched on the machine, is this OK?
On some systems immediately after the RS1 MSI was succesfull, proof of this from the MSI log we create during install, another MSIexec process is started which removes the software again. We have been trying to figure out why, could one of the Custom Actions in the RS1 MSI cause this?
Thanks again,
Cas