Possible false possitive detection

When I connect my external harddrive Windows Built in Anti Virus dectects  Power ISO applictation installer as a PUABundler:Win32/FusionCore  I have set to allow this application to run on my system and to igrnore it. Is this a false positive? Or is it a real threat?

Anytime you come across a suspicious file, a detected threat, suspect a file detection may be a possible false positive or you want a second opinion, submit the file to one of the online services that analyzes suspicious files.

• Jotti's virusscan
• VirusTotal
• VirSCAN
• Hybrid-Analysis

--In the "File to Scan" (Upload or Submit) box, click the "browse" button, navigate to the location of the suspicious file(s) and submit it for analysis. If you get a message saying "File has already been analyzed", click Reanalyze or Scan again.
 
By the way....A Potentially Unwanted Application (PUA)/Potentially Unwanted Program (PUP) detection is a very broad threat category which can encompass any number of different programs to include those which are benign as well as problematic. Thus, this type of detection does not always necessarily mean the file is malicious or a bad program. In fact, some programs falling into the PUP category have legitimate uses in contexts where an authorized user or administrator has knowingly installed it. I deliberately have potentially unwanted app blocking disabled on all my laptops because many of the legitimate programs I use are detected as PUPs.
 
For more specific information about PUPs, you can read What is a Potentially Unwanted Program (PUP) or Potentially Unwanted Application (PUA)? (Post #9).