This will help if you installed an incorrect or mismatched driver. Try to set a system restore point before installing a device driver. It is highly recommended to always use the most recent driver version available. 802.11w (WFA-Protected Management Frames) PAP, CHAP, TLS, GTC, MS-CHAP, MS-CHAPv2 Security WPA and WPA2, 802.1X (EAP-TLS, TTLS, PEAP, LEAP, EAP-FAST), EAP-SIM, EAP-AKA Network Architecture Ad-hoc mode (Peer-to-Peer), Infrastructure mode Wi-Fi Alliance Wi-Fi Certified for 802.11ac, Wi-Fi CERTIFIEDa/b/g,Wi-Fi CERTIFIEDn, WMM, WPA, WPA2, and WPS, WPS 2.0, Protected ManagementFrames Data rate 1Mbps, 2Mbps, and up to 3Mbps I'm running Win 10 Pro 64-bit.- Standard Bluetooth V4.0 LE, V3.0+HS, V2.1+EDR Tried to plug the usb cable to another 2.0 header, still nothing. If it's worth mentioning, after I uninstalled everything under Bluetooth in device manager and reinstalling the BT drivers, Bluetooth does not show up in device manager anymore even when I show hidden devices. I even tried to uninstall everything under Universal Serial Bus controllers. Tried to install previous version of bluetooth drivers. Tried to uninstall everything under Bluetooth. Plugged it back, the error appeared again.so basically, it was the bluetooth. Tried to unplug the bluetooth usb cable from the usb2.0 motherboard header (MSI Z97 Gaming 5), and the unknown usb error disappered. I also noticed that I get Unknown USD Device under Universal Serial Bus controllers. Upon, checking the properties, I get code error 45. I selected View>Show hidden devices, and the bluetooth appeared but was all greyed out. I checked device manager and "bluetooth" was not listed anymore. I downloaded the latest drivers from Intel, installed, restarted, still nothing. Checked windows settings and there was no option to configure my bluetooth on/off.
Then after a month or so, when I wanted to send something via bluetooth, my bluetooth icon in the task/tool/notification bar disappeared. I tested WiFi and and Bluetooth sending and receiving. I downloaded the latest Intel drivers for it (AC8260 for AC Wifi and Bluetooth drivers) and got the thing to work. I recently bought a Gigabyte GC-WB867D-I rev4.2.
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