I've installed Garmin Express Version 4.1.7.0 (the latest version).
However, it doesn't detect my Edge 800 device. The device is connected to my laptop (running Windows 7 Enterprise Service Pack 1).
Windows Explorer can see the device and lists it as "Removable Disk (F:)". However, when I browse through the directory hierarchy, the Activities folder (and all of them) is empty. I know that's not the case as I have activities on there including one from this morning.

I'm sure it's not the USB cable as I used it to sync my Edge 800 last night at home on a different PC.
What do you recommend I try?
Thanks.