Am not sure about your system but some of mine has to be disabled from BIOS setup. Can try this and see if works for you.

Hello,
To go to Bios setup re start your comp while hiting F2 key to enter bios and you have to find where the bluethooth is to disable it,but remember not to change any other settings,when done hit f10 and save new setting and exit,try and let me know.