Limited connectivity, very slow, disconnecting WFI

Hi @guiui59 ,
You have installed a different driver that could maybe working, but from this post @megavolt it is suggested another one because there is known problems using different drivers.
Ralink RT3290 Bluetooth adapter not found - #3 by megavolt

Please, consider to remove your installed drivers and follow the instructions of the post in order to install the ones that works best.

Regards,