Hi Harries,
Only correct driver for the BT module should help. If you can please install correct version of the driver from acer. before that uninstall the current generic driver installed from Microsoft update with delete driver check box selected. uninstall any BT device trace with show hidden device option turned on there.
After uninstalling all the drivers do not restart the PC yet and install drivers from the acer or BT/wireless combo card manufacturer support. It may be intel AX 201 driver. So, either of the drivers from acer or intel should work.