Microsoft Bluetooth Enumerator Driver Windows 7 ((new)) →

regsvr32 fsquirt.exe regsvr32 bthprops.cpl regsvr32 bthserv.dll

If the enumerator is missing entirely:

Windows 7 was released before Bluetooth 4.0, 5.0, and LE (Low Energy) became mainstream. The Microsoft Bluetooth Enumerator driver ensures backward compatibility and basic functionality. Key dependencies include: microsoft bluetooth enumerator driver windows 7