This is because:
Since there is no official Windows 10 driver for the ISSCBTA chipset, the standard solution is to use the or the original ISSC Vista Driver running in Compatibility Mode.
The ISSCBTA driver is typically tied to hardware with the following hardware ID: USB\VID_1131&PID_1001 Category: Bluetooth Radios/Adapters
You will need the driver package originally designed for Windows Vista.
Replace the adapter. A modern USB Bluetooth 5.0 dongle (e.g., TP-Link UB500, ASUS BT500) costs $10–15 and works instantly with Windows 10 native drivers. If it is an internal card, you can disable the ISSCBTA device in Device Manager and use an external dongle.
The driver name often appears in Device Manager under as ISSCBTA or ISSC Bluetooth Adapter .
Select > Browse my computer > Let me pick from a list .
Here’s why:
Before installing any driver, confirm that your device is actually using the ISSC chipset.