Windows 7 - Want to know the metadata package installation process

Hi,

I have two Windows 7 clients (both are Build 7600, x86).
When I connect a USB flash to one of the PC, device metadata package was installed in the “%LOCALAPPDATA%\Microsoft\Device Metadata\dmrccache\” directory. The thing is that I don't know when it's installed since I wasn't observing that all the time.
Anyways, I wanted to test this metadata installation on the other Windows 7 client but this package wasn't installed after waiting more than a day.

After reading MS's documents for metadata package installation, I was convinced that metadata package should be installed right after device is connected to that PC. But even after dmrc.idx file is being updated, no package is being installed in the directly.
I don't understand why DMRC is not recognizing the Hardware ID this time and not pulling down the metadata package from the Windows metadata server.

In the device & printer folder > Device Installation setting, both PC have the same setting; Yes, do this automatically.

Please help me understand what I should expect about metadata installation?
Is this installation should be done right after device is connected to PC or I can't even guess when it will be installed since it will be a rundom installation?