a bluetooth key for a PC that doesn't have one?
blue tooth key bought to be able to connect the computer to the internet via a mobile data access point on a telephone, alas, it doesn't work like that, .... the computer can provide access but not fetch internet access. probably not a problem with the key itself but with the clarity of the information provided by the manufacturers.
You'd better be a good IT specialist to understand how to configure this thing; you need internet access to update the bios (!) and only then will you be able to see it in your settings.