Use the links on this page to download the latest version of bcm20702a0 drivers. all drivers available for download have been scanned by antivirus program. supported os: windows 10 64 bit, windows 8.1 64bit, windows 7 64bit, windows vista 64bit, windows xp 64bit; download. driver update utility. updates pc drivers automatically; identifies. Q.i have a new hp laptop that i did a clean install of windows on but now it has an ‘unknown device’ bcm20702a0