It took a LOT of digging but I was able to find a legitimate 12.2.1.16 (64-Bit for Older Graphics Cards) Installer, apple has hidden it completely. Here is what I've tested. I hope this helps.
Windows 10 Pro (with standard alphanumeric password, no pin)
IHS 3.1.76.0
iTunes 12.2.2.25 (64-Bit for Older Graphics Cards) (includes apple music)
LIMITED functionality. Will import files from watch folder to library (434 movies). Can not manage library via IHS's "iTunes View" tab. Longer/larger mp4's wouldn't play via Apple TV3 (2+ hour and 8+gb in size) However small movies/files were fine. Could play all files via iTunes interactive mode.
DID NOT TEST 12.2.2.25 WITH PIN as I was aware it wasn't going to function properly.
Windows 10 Pro (with standard alphanumeric password, no pin)
IHS 3.1.76.0
iTunes 12.2.1.16 (64-Bit for Older Graphics Cards) (includes apple music)
All functions worked correctly (to my finding)
Windows 10 Pro (with 4 digit pin password)
IHS 3.1.76.0
iTunes 12.2.1.16 (64-Bit for Older Graphics Cards) (includes apple music)
IHS works, but it will not authenticate to start as a service. You can get it to run in app mode just fine.
Windows 10 Pro (with standard alphanumeric password, no pin)
IHS 3.1.76.0
iTunes 12.2.1.7 (64-Bit for Older Graphics Cards) (prior to apple music)
All functions worked correctly (to my finding)
Windows 10 Pro (with 4 digit pin password)
IHS 3.1.76.0
iTunes 12.2.1.7 (64-Bit for Older Graphics Cards) (prior to apple music)
IHS works, but it will not authenticate to start as a service. You can get it to run in app mode as mentioned above but it's not as fun!
Windows 8 Pro with Media Center Add-In
IHS 3.1.76.0
iTunes 12.2.2.25 (64-Bit for Older Graphics Cards) (includes apple music)
LIMITED functionality. Will import files from watch folder to library (434 movies). Can not manage library via IHS's "iTunes View" tab. Longer/larger mp4's wouldn't play via Apple TV3 (2+ hour and 8+gb in size) However small movies/files were fine. Could play all files via iTunes interactive mode, oddly enough.
Windows 8 Pro with Media Center Add-In
IHS 3.1.76.0
iTunes 12.2.1.16 (64-Bit for Older Graphics Cards) (WITH apple music)
All functions worked correctly (to my finding)
Windows 8 Pro with Media Center Add-In
IHS 3.1.76.0
iTunes 12.2.1.7 (64-Bit for Older Graphics Cards) (prior to apple music)
All functions worked correctly (to my finding)
Beer time.