the Problems that you have is either a Logitech nor a Bluetooth Problem .
I have the same effect her on my M90 with Dell Bleutooth 355. I tracked this Problem, but have no Solution until now.
The problem are...
maybe it's the same issue that i have.
It is not only a Problem with Bluetooth (Testet with 350 and 355) it is a issue with the USB-Bus. Every time a 100 Driver does a UAC-Message or an Display-Change (e.g starting Games) the...
i hava a really strange Probem with any NVidia-Driver > 97.46 (Dell One) on my Dell Precision M90
with NVidia Quadro 2500M (512MB), 2,16 GHz Cor2Duo, 2GB RAM, Vista Ultimate
Most of the other Drivers (especially the 100er...