Hello,
When you mention you cannot install the HID keyboard driver, are you trying to manually install something from Device Manager, or is Windows throwing a specific error message at you automatically?
Let me know if you see any yellow warning triangles next to your Bluetooth or Keyboard devices in Device Manager. It is also good to know if this keyboard was working fine before and just stopped, or if this is the very first time you are pairing it.
Give me a bit more context on what you are seeing so we can get it sorted.