What’s the best program for uninstalling software? Something that can find stuff that the windows uninstaller can’t….

I bought this Western Digital external hard drive and started using it, but the stupid thing wouldn’t wake up until I installed the back up software that came with it. The pricks at WD decided this software shouldn’t be included with the drive and put a 30 day trial on it. After 30 day’s you have to buy it to get a key. I already have back up software that’s much better, so I figured I’d just un-install this WD software. I can’t find it anywhere….. Every time the computer is turned on, I have all these damn windows that pop up telling me I need to register this software. It’s very frustrating.