I am having the same problem. I have my thunderbolt set to show as a disk drive as default and to alert me when it is plugged in. Unfortunately it does neither. The first time I plugged it in it did take about 30 seconds and showed up like I am used to. Every time since, it does not show at all. I am very confused. I currently disregard the first pop up (the verizon one) but then nothing else pops up or shows up under my computer. It says it is properly installed in the device manager but when I look at the "volumes" tab everything is blank/no info at all. I'm running windows 7.... Can anyone advise a next step???