Fix Bluetooth Not Showing or Missing in Device Manager on Windows 10
How to Fix Bluetooth Disappeared or Missing on Windows 10
Step 1) Scan for hardware changes in Device Manager, if you see yellow exclamation mark on Bluetooth device, make a right click and update it.
Step 2) Install Bluetooth driver from system manufacturer's website- If you have intel wireless Bluetooth use Intel Driver Support Assistant: https://www.intel.in/content/www/in/en/support/detect.html
Step 3) Make Sure Bluetooth is enabled in BIOS- Start your PC and tap F2 to enter the BIOS
Step 4) Boot into Safe Mode and then Back to Normal Mode (msconfig)
Step 5) Enable Bluetooth Support Service
Step 6) Run the Bluetooth Trouble-shooter
Step 7) Uninstall and reinstall Bluetooth driver from apps and feature and device manager
Step 8) Buy Bluetooth stick/dongle