This Bluetooth adapter will work on Windows without additional drivers, however to achieve the advantages of Bluetooth 5.3 you will need to install the drivers that are included with the adapter. Please hit us up on facebook if you have these drivers. The drivers that are on Windows only work at Bluetooth 2.0
After a lot of time looking we are still unable to find any drivers for this device. If there is going to be any driver at all they would need to have been made by Actions the maker of the ATS2851, and even generic devices we have seen using this chip have no drivers on offer.
We have contacted Actions & Ugreen and at this time we are still waiting for a reply.
Dec/1/2022: Ugreen have passed it to their QC department.
Feb/1/2023 Still nothing.