Power Eraser Pop-ups

Hello.

I have been having this problem with Norton Power Eraser, which consists of a series of pop-ups. (I use Windows 7)

These vary in frequency, sometimes showing up several times a minute. They appear over any open window, making them even more annoying.

Here is what the pop-up looks like:

I have tried multiple ways to stop these pop-ups, with and without the "Don't show this again" box checked.

Norton was "complaining" about two of my programs. After I removed them both with N.P.E., the pop-ups continued.

Even tried to turn off the program through Norton settings, and uninstalling it, but it doesn't show up anywhere.

 

I wonder if it's some kind of bug with the program. There isn't much information about this on the net. Does anyone experience a similar issue?

Thank you for reading.