I am running Win7 x64. I have installed the correct driver. The mouse connects and responds with gestures and everything. Good to go! Wrong.... Every now and then the mouse will freeze in place and become unresponsive for say, 1 - 5 seconds. This is quite frustrating. I love that mouse. I use it at work all day on my iMac. I want it to work at home just the same. Anyone else have this problem? I can't seem to dig anything up on the net. One last thought, I'm using a bluetooth USB dongle. It's pretty old... but if it connects, I would expect that it work fine always, ya know? I have no other bluetooth devices to test the dongle either.