So basically I need to get into download mode as recovery is not working (Beta Testing for Slim and it just doesnt load) so I need to use download mode. But what happens is I connect, and it says this usb device is malfunctioning. It has done that for 3 phones (All samsung, 2 not rooted and one rooted) This computer used to connect fine but now it doesnt. I've tried everything listed in threads, reinstalling kies, installing drivers, uninstalling and reinstalling, all of it. It just doesnt seem to work. I've rebooted between each reinstallation and just nothing works. I've tried all USB ports and tried plugging the phone in while in recovery, download and just regular with usb debugging on and off. I seriously have no clue what to do.