Get USBdeview. Uninstall all USB stuff (you might not be able to use your mouse or keyboard all of a sudden at some point, if you uninstall them first when they're USB driven). However windows re installs all automatically when you reboot, and might clean up an eventuall USB mess up. If that's not helping, i still think your laptop doesn't have enough power to drive your WD hardisk; you'll need a powered USB harddisk hub with proper 5 volts supply on that bus.

PS It's still not clear to me what kind/brand of computer you have. Power problems are more likely with a laptop or tablet. My DELL precision laptop has only one USB port having extra power for such use. Did you try the drive on another computer yet? F