I just downloaded an updated W7 Home Premium x64 SP1 ISO, and I was copying those files over to my W7 installation thumb drive. It seems to fail every time I copy the files over. The drive just disappears, no longer listed in My Computer. I also hear the device disconnected sound. I tried moving it from my front panel USB ports to one of the ports in the back and the same thing happened. I believe this is grounds to call it a dead drive...?