In Device Manager right click on each TV entry and select uninstall.
Then disconnect the TV Ethernet cables from the modem. Reboot and check to see if the TV still appears in 'other devices'- Well they reappear back after reboot .
- they are also shown in Device Manager under "digital media devices" - but again they reappear back after reboot .
I think you well proposed all places they can be found in my system...
So, the TVs reinstalled in Device Manager after trying to remove them.
You said, there are two separate entries for the TVs in Device Manager, one under 'System Devices' and one under Digital Media Devices.
When you tried to remove the TVs from Device Manager, did you remove both TVs from both entries, (System Devices) & (Digital Media Devices) then disconnected Ethernet to them and rebooted?
If so, this time disconnect both TVs from the Ethernet first. Go back into Device Manager and try right clicking on each TV entry and choose to disable. Reboot. Let me know what shows up again and where.
Does your Windows 7 PC have Wi-Fi capabilities? If so, what shows up under Wi-Fi devices in Device Manager?
How old are the Smart TVs, both have Wi-Fi? I have to ask.
You said, in Device Manager both TVs have the same driver version.
Do you have a Modem or a Modem/Router combination, or are the Modem and Router, two separate devices?
You said, right clicking on Other Devices has no sub menu under properties and no option to remove.
"I think you well proposed all places they can be found in my system". I think there may be more.
Do you have a newer Win10/11 computer or can borrow one?