@kski Hello, thanks for reporting the issue to the community. May I know how long have you had the adapter? Did you ever upgrade the Windows system or change any setting in your network when this...

@DigitalBulldog Sorry to hear that the adapter causes troubles. Could you please help check the system info and driver info on the computer, and we will check if there is any...

@DanMck Please follow the instruction below to check the wireless negotiation speed on the computer when connected to the AX3000 router's 5GHz signal, show me the screenshot:...

@zeg361 Hi, this adapter is really old, I'm afraid it is not compatible with the latest Windows 10 system, as there is no driver for it. You may check this.

@Richy Hi, what is the model number of this Bluetooth 4.0 Nano USB adapter? Is it UB400? I'm afraid it is not compatible with a printer, since we don't provide a driver or utility for the printer.

@ciuseppec Uninstall the driver from Device Manager, then install the below one: https://static.tp-link.com/2020/202006/20200601/00015960-RTLWlanU_WindowsDriver_1030.38.0712.2019_Drv_3.00.0032.L.zip...