I've had only one annoyance with 64 bit Win7. Sometimes it will tell me "Device not recognized." This is what I do:
First, unplug and plug back into the micro USB on phone. This works 90% of the time.
Second, if that fails, unplug and unselect (or select if not selected) the USB debugging and plug it back in.
Third, if that fails, I reboot the phone while plugged into the USB cable.
I rarely have to do either the second or third but I've never had to reinstall drivers.