I have windows 7 and I use Chrome as a browser.
I had the same problem with Win 7 and Chrome (however, also IE9, both 32 and 64 bit versions, gave me the same problem).
It was solved in the following way:
1. I reset the camera's hardware via the "reset" button behind the camera, which I pressed with a pin for 15 seconds
2. I used the latest Firefox browser
If you invert my two steps and it works, you don't have to re-configure the camera (which took me a good ten minutes)