. Drivers designed for Windows 8.1 or Windows 10 frequently maintain compatibility with Windows 11. Compatibility Mode
There is no official specifically developed for Windows 11 . The manufacturer, MediaTek , ceased official support for this legacy card years ago. Ralink Rt3290 Bluetooth Driver Windows 11
If replacement is not possible, the forced Win8.1 driver is your only path, but expect occasional Bluetooth disconnects and a missing adapter after waking from sleep. try the following troubleshooting steps:
If you encounter issues with the Ralink Rt3290 Bluetooth driver on Windows 11, try the following troubleshooting steps: Ralink Rt3290 Bluetooth Driver Windows 11