: Go to Device Manager > Right-click Unknown Device > Properties > Details > Hardware IDs . Search that string (e.g., USB\VID_0BDA&PID_8771 ) to find the exact manufacturer.
: If your "dongle" is actually an internal Intel card, Intel provides a dedicated Bluetooth for Windows 7 installer (look for file BT_21.40.5_32_Win7.exe for 32-bit). How to Install the Driver bluetooth usb dongle 50 driver windows 7 32bit verified
: Common in newer 5.0 adapters. Drivers like version 1.9.1040.4004 are verified to work with Windows 7 32-bit. CSR Chipsets : Go to Device Manager > Right-click Unknown
Downloading from untrusted sites leads to malware. Only use these : bluetooth usb dongle 50 driver windows 7 32bit verified
If your dongle uses Intel hardware, download the specific Intel Wireless Bluetooth for Windows 7 package. Intel® Wireless Bluetooth® for Windows 7*