Vista - Bluetooth mouse issues

I have a Dell Inspiron 9400 running Vista Home Premuim edition. Ever since I've had it the machine will never recognise the Dell bluetooth mouse when I turn the machine on. The fix up until now has been to disable and renable the Dell Truemobile 355 Bluetooth + EDR driver. The mouse would start working. However, sometimes when the UAC window would open the mouse would stop working.

Yesterday I had a problem with the 'user profile cannot be loaded' and I sorted this by using the procedure in regedit for renaming a .bak file described elsewhere in this forum. This fixed the user profile problem but now I can't disable the Bluetooth driver, the disable box is greyed out. The only way I can get the mouse to work is to boot up in safe mode, disable the bluetooth driver, reboot the machine, enable the driver normally (the box then goes grey) and hope for the best.

Any suggestions on how to permanent solve these problems?

I have a Dell Inspiron 1720 that I got in the middle of January. It had Bluetooth mouse (Dell) problems from day 1. I got a lot of personal help from Dell through phone calls that got it about 90% fixed. They finally said to get it completely fixed I would need to reload Vista which I didn't want to do. After another problem (driver conflict) with the notebook, I did have to reload Vista with Dells help. Since the reload, the bluetooth mouse has been working at 100%. Yes, I know that is not really good news.
At the time I had Vista Premium but upgraded to Ultimate after the mouse problem was fixed.
Frag

In services.msc there is something like "bluetooth support service"... someone else has my vista64 box with bt, so I'm not sure of the exact name. Anyhow, when I'd try to start this, nothing would happen. I found this fix for XP which worked for Ultimate 64: You receive an error message immediately after you install the USB transceiver for a Microsoft keyboard or optical mouse to configure Bluetooth on a Windows XP SP2-based computer

Other than that, maybe hop into the bios and check around? Sorry if the link does nothing for you, for me it was salvation from frustration.