Notifications not syncing between PC, Phone and Tablet.

I have a PC with Windows 10 Home 64Bit, version 15063.296. A Lumia 640 with the latest build of Windows 10 (consumer, not insider), and a Linx 1020 tablet with the latest consumer build of Windows 10 32Bit Home.

The PC and tablet are clean installs, the phone was an upgrade from Windows 8.1.

All of them are logged in using the same Microsoft account.

Whatever I do I can't seem to get notifications to sync between them. I have all of the options that I've found set to on for syncing but none of the devices seem aware that the other exists even when connected to the same local network.

When I go to sync settings none of the other devices are named on the sync menu for any of the devices.

Any help would be appreciated.

I've even installed the phone companion, but that doesn't seem to do anything.

Source: Notifications not syncing between PC, Phone and Tablet.