This is what I'm working with.
Kensington Bluetooth USB Adapter Model# 33085
... RIM Desktop Software forum
Re: Bluetooth problems with Vista
Sorry my friend, I think you're doomed. I spent weeks looking for a way to sync Widcomm/Broadcomm drivers over a bluetooth. It's not a BB problem, I had the same issue with a number of PDAs and cell phones.
I solved my problem by using generic Vista BT drivers but not sure if you can use those with Kensington.
I'd try installing regular Vista drivers to operate your Kens BT. You can find them in C:\Windows\system32\Drivers
All the drivers starting with Bt*.* are bluetooth drivers. Try going to Device Manager and Update Driver for your bluetooth. Then pick the driver by yourself by pointing at that location.
Check a thread I posted a while ago, you might find it useful.
Tags for this Thread