This small app can install generic Microsoft drivers for your Bluetooth adapter. The app is based on a widely known method of patching the %WinDir%\inf\bth.inf file.
The app works for most, but not all, Bluetooth adapters; whether that be USB dongles or built-in adapters. A strikingly good point about Bluetooth Driver Installer is that before making any changes to your system, the app automatically creates a restore point. This is useful if anything goes wrong. You can use Windows System Restore to revert any changes that have been made to your PC.
Bluetooth Driver Installer is a reliable app, if the WinDir%\inf\bth.inf file is corrupted in some way then Bluetooth Driver Installer will patch it, thereby repairing any errors you may have. Bluetooth Driver Installer also automatically identifies any devices you have and then can install the compatible driver, if you need it.
Overall, Bluetooth Driver Installer is a great app that is lightweight, has a standard user interface, and is very simple to use; it provides wizards to run you through the process. The app also provides you with data in the form of a detailed report on the device model, manufacturer and subversion used.