blue tooth mulfunction

[zebere]

My old  hp laptop (hp probook 640  G1-32 bit) blue tooth not  working. 

[Paul_Tikkanen]

Not all 640 G1's came with built in Bluetooth, which is a function of the wireless adapter.

What model Wi-Fi adapter does your notebook have and what operating system are you running on it?

[zebere]

windows 10 pro

[Paul_Tikkanen]

The reason the Bluetooth is not working is because the Intel 6235 BT adapter is missing the driver (Unknown device) and the PCI device that needs a driver is the Realtek SD card reader.

Below is the link to the Realtek SD card reader driver for your notebook:

Realtek PCIe Media Card Reader Driver

sp95557.exe

Neither HP nor Intel have the W10 Bluetooth driver for the 6235 Wi-Fi adapter anymore.

However, I was able to find the W10 32 bit driver on this reputable 3rd party driver site:

Download Intel Centrino Advanced-N 6235 Bluetooth Driver 19.11.1637 for Windows 10 - Softpedia

The file download is on the left side of the webpage and you have to select the Softpedia Secure Download (US) source because as I wrote above, Intel has removed the driver from their website so if you select the External Mirror 1 source you will get nothing.