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We reserved a PCI ID (if I remember correctly), so it's more about asking Microsoft to put it in their update system. I have no idea if it's feasible for us.
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I was thinking more of updating the entire set of the agent and drivers, similar to how XenServer VM Tools for Windows have it implemented. Using a scheduled job, they regularly check whether an update is available, and if so, they carry out the update of both the agent and the drivers themselves.