Recently I've being getting USB not recongized errors. I've searched on the internet and tried turning power off, removing battery since I have a laptop, removing all USB devices, waiting 30 minutes and restarting. It worked, for a couple of hours. Then the same thing would happen again. All USB ports will get usb not recongized, regardless of what I plug in. I've also tried USB hubs, did not work. The USB ports do supply power through, as I can charge my phone. I've reinstalled all USB drivers, which didn't fix the problem. HP Pavilion dv5 laptop, windows vista. Thanks for any help.