Just replaced my PC with a Windows 8 laptop. Ive installed SD 2.6 and the most up to date Garmin usb drivers.

I was going to ask for help because if I try to download more than one route from my laptop( running Windows 7 and SD version 2.7.0) onto my Garmin 496 the screen freezes and it will not even allow my to get out of the Sky Demon page when using Alt/Contl/Delete.Very frustrating!
Out of frustration I found a way of achieving multiple downloads without freezing SD. I loaded the route onto SD (laptop) removed the USB connector to the GPS and pressed "Send to device". Of course it says it is unable to connect.
Replacing the USB connection and repeating the Send routine achieves a successful transfer to the GPS. This worked six times on the trot.
I hope this posting will not only help people to overcome this same problem in the meantime but also hope it will help Tim and his team to identify what may be the cause of this problem?