NPE 6.5

Comments regarding earlier Norton Power Eraser version, as far as I know, apply to NPE 6.5.  

NPE does not detect malware (that is what Norton Security is for), it presents you with a list of files that could be malware.  It is meant to be run when your Norton program does not detect anything malicious but you still suspect that something may be acting suspiciously on your PC.  If there doesn't appear to be anything wrong, the results returned by NPE will almost always be safe files that belong to applications on your system.  NPE doesn't tell you much about a file because it really doesn't know much about the files it presents - that's the whole point, if Norton knew whether the file was actually malicious or not you would not have to run NPE, as Norton Security would catch it if it was malicious and NPE would not flag it if it was a known good file. 

https://community.norton.com/en/comment/7865241#comment-7865241 

Norton Power Eraser uses our most aggressive scanning technology to eliminate threats that traditional virus scanning doesn’t always detect, so you can get your PC back. Because Norton Power Eraser is an aggressive virus removal tool, it may mark a legitimate program for removal. However, you can always undo the results of a scan. It can also help detect and remove Potentially Unwanted Programs.  For instructions on using Norton Power Eraser, see the tutorial.

https://community.norton.com/en/comment/7954241#comment-7954241

The NPE is a very aggressive scanner that was designed to be used as a rescue tool in emergency situations when your operating system becomes unstable or you believe you have deeply embedded malware that cannot be detected by a standard antivirus / anti-malware scan.  The NPE is prone to false positive detections and can sometimes remove important system files and registry entries [...]

https://community.norton.com/en/comment/7944441#comment-7944441

One thing to keep in mind is that NPE does not positively detect known malware - that is the job of your regular Norton Security product.  NPE instead looks for files that might warrant investigation if you suspect that you are infected and regular scans come up clean.  NPE will flag many legitimate files, so never assume that what NPE finds is truly malicious.

https://community.norton.com/en/comment/7975311#comment-7975311

Download and run Norton Power Eraser - Free virus and malware removal tool for Windows
https://support.norton.com/sp/en/us/home/current/solutions/kb20100824120155EN

Community recommends Malwarebytes Free for second opinion scan. 
I recommend Malwarebytes Malware Removal Help for malware remediation &or security checkup.  

How to install and run a scan with Malwarebytes (Guide)
https://malwaretips.com/blogs/scan-malwarebytes-anti-malware-2-0/

Malwarebytes Malware Removal Help
https://forums.malwarebytes.com/forum/108-malware-removal-help/