Laptop (the x1 carbon i7 2019-8565 - u AC9560 160 MHZ) installation WIN10 pro, bought thinkplus suite 2.4 G + BT5.0 dual-mode mouse, using direct connect bluetooth for the first time, there is no problem, try to switch between the 2.4 G, no problem, then switch the bluetooth forgot to do it (what), or even not on, and then unload the bluetooth mouse in equipment management, to add a bluetooth device, the bottom right hand corner tip search bluetooth (did not add the search interface list of bluetooth devices, after connection, tip cannot be matched in a minute, if scanning hardware changes in equipment management, the mouse automatically appear in the list of bluetooth, then open again to add to connect bluetooth device, the lower right corner will not prompt found bluetooth devices, also do not tip cannot be matched, the mouse move, the blue indicator light will be flashing, the feeling is a state of match, I also is a product of the fick three mode (2.4 G/BT3.0/BT5.0) can use arbitrary switching, doubt the mouse problem, but the use of the mouse on another laptop (thinkpad T450S), is also a WIN10 pro, can be normal use, don't know where is the problem,,, want to completely remove the original had connected to the bluetooth mouse, bluetooth tools through the Internet to download a execute commands btpair -u also not clear,,, don't want to reinstall system, any friends have a solution?