Power Eraser continually loading

I'm not even sure I am in the correct forum, so please bear with me... I had a  trojan  problem sending out e-mails from my hotmail account and I did a scan and could not seem to find any malware, so I finally  did come  upon a link for Power Eraser and decided to try that- since I activated it  hours ago, it has done nothing but continually load- I  clicked on the little gray bar on the upper right  but  even after that closes   it is still displaying  on the lower left of  my screen and I seem not to be able to remove it or get it to stop.

 

I get my Norton as a Comcast customer  and I am not a very experienced  user of it.  I have changed my password and hope that has solved the trojan problem , but I am concerned because I cannot see that  Norton  tried to block any intrusion in any way when the attack happened- apparently in the wee  hours of the am.  I never click on embedded  links in strange e-mails and I don't know how the trojan gained entry, but I thought maybe  the Power eraser would remove whatever might be there. I guess it is obvious I really  don't know much about all this.

 

At this point I just want to get rid of Power Eraser somehow, as it apparently is doing nothing for me... HELP!