@bkrbr Hi, Thanks for your information. Please relocate the RE600X next to the main router and test if the issue still exists. Besides, please also contact your phone to the modem WIFI, and test if...

@Manpreetsingh Hi, Please reboot the MR600 and scan a few more times.

@amtrakuk Hi, Could you please provide more description about your issue? Which devices have this issue? Please also provide us your settings and also your network topology.

@VarunKadavil Hi, Do you mean that the adapter will disappear from the device manager? Will the issue happen both on 2.4G and 5G?

@Franz47 Hi, Please reboot the computer and then try to delete it again. If the operation system is Win 10, you can press Win+X, search driver in the search bar, find APPs and features, find t2u...

@Johl Hi, I am not sure what kind of hissing noises it is, but you can first try different USB ports.