The hot fix from the following link may be appropriate to you.
http://support.microsoft.com/default...en-us%3b936003
"KentuckyRanger" <KentuckyRanger@discussions.microsoft.com> wrote in message
news:2E2B9AA0-F64F-47D6-AC79-9E08C6B5F1C9@microsoft.com...
> I'm having the same problem with my Logitech Bluetooth Keyboard and Mouse.
> About Twice a Week, I have to get Vista to re-recognize it. Like you, I
> never
> change the USP location and never un-plug it. Vista just acts like I just
> plugged it in and I have to re-install them about 2-3 Times a Week.
> I figur this problem will be taken care of in One of the up comming Vista
> updates.
> I'm running Vista Ultimate X64 so I'll have to wait a little longer than
> the
> 32bit O/S operators, LOL!
>
> "Aliro" wrote:
>
>> One of the many USB related problems I've encountered since upgrading to
>> Vista (Home premium) is having to re-activate my Bluetooth mouse &
>> keyboard
>> about every other time that I start my PC. As it is not every time, I
>> have a
>> suspicion that it somehow relates to whether Vista finds the Bluetooth
>> dongle
>> to be on the same USB port as the last time or whether it thinks its a
>> different port - and therefore a new device. I never physically change
>> its
>> USB port (apart from once to try to see if it solved this problem - but
>> it
>> didn't appear to matter which port it was on) - but I know I have a
>> similar
>> problem with my all-in-one printer/scanner which appears on the system as
>> 2
>> separate devices, only one of which works - though which one changes
>> randomly. Other USB devices appear to have similar problems. As far as I
>> know the various related drivers all all up-to-date - but I may be wrong.
>> When first upgrading to Vista I had to download and install the latest
>> Logitech Setpoint (3.30) drivers to get the keyboard to work properly (on
>> all
>> the multi-media controls) - but maybe I missed out on a driver for the
>> 'dongle/controller' or whatever it is called.
>> I have just come across a KB article (934633) confirming the problem with
>> connecting a "USB multifunction printer device" and maybe this is the
>> same
>> problem. Any useful suggestions for solutions would be most welcome, I
>> don't
>> want to just plug in an old PS2 keyboard & mouse - even though that
>> solution
>> would be the least hassle.
>> Not that I think it is really relavent but my system is a Dell E520 2 x
>> 2.13
>> Ghz with 2Gb ram with a Dell Bluetooth keyboard & mouse.