Fujitsu FI-6130 & FI-6230 Scanners - Device Not Found, Missing Driver (Win 10)

This is more of an advisory, which will hopefully save someone the 3 hours I have wasted today.

We have a small fleet of Fujitsu FI-6130 and FI-6230 scanners.  These are supposedly the the same beast, other than the flatbed on the FI-6230.  Or are they? They do have slightly different device IDs in Device Manager.

I am rolling out a new image on our HP 840G Elitebooks.  Most users have a scanner at their desk, but with covid, most people are working remotely, so no one is using these, and we are in the off season for our business. 

I recently deployed one of these PCs to a user who tried to use their FI-6130; the PC could not find the device driver. No ding when plugged in, nothing in Device Manager.  Nothing!  Programs and Features shows it's installed.

The FI-6230 works just fine.  Downloaded the driver again, indeed tried some older drivers.  No joy.

I went back to the last 2 PCs that had not yet been upgraded and eventually found that "File and Printer Sharing" was enabled. I had tightened security up a bit for use at home and disabled "File and Printer Sharing" on the new build.  My test routine includes the scanner, but I have one of the FI-6230's and, as noted, these test OK. 

So, while it makes little sense to me, it's the same driver for both scanners, but the FI-6130 requires "File and Printer Sharing" enabled and the FI-6230 does not.  Indeed, I don't think this configuration should be relevant to the device at all for the local user.

The PCs are running Windows 10 Pro, 64 bit, mostly V20H2 and a couple V2004.

Using the latest Fujitsu drivers for Windows 10