I havent plugged my phone into the computer for a while so I dont know when this issue started... but for some reason my samsung Focus will not be detected by any of my PCs. (all on windows 7) It doesnt show up in device manager, my computer or the zune software. I tried power cycle and also tried the 'reset' option which deleted my phone and started over. I am using the cable that came with the phone. Any other ideas?