can't open mp3 files - NPPTools.dll not available

[Alleged69]

Whenever I try to launch an mp3 file (by double clicking on it) i get an
error stating
"application has failed to start because NPPTools.dll can not be found".
When I click OK, an unknown mp4 player opens but it can't see/open the mp3
files.

I've located a download of the NPPTools.dll ZIP-file but when I try to
extract it I do not have access to allow installation into the Windows/System
directory where the instructions say to extract it.

1) If NPPTools.dll will fix my problem i need exact, step by step
instructions of what to do and how to grant permissions that allow me to
extract it into the proper Windows directory

2) If the missing NPPTools.dll is not the issue, what do I do?

 

[Malke]

Whenever I try to launch an mp3 file (by double clicking on it) i get an
error stating
"application has failed to start because NPPTools.dll can not be found".
When I click OK, an unknown mp4 player opens but it can't see/open the mp3
files.

I've located a download of the NPPTools.dll ZIP-file but when I try to
extract it I do not have access to allow installation into the
Windows/System directory where the instructions say to extract it.

1) If NPPTools.dll will fix my problem i need exact, step by step
instructions of what to do and how to grant permissions that allow me to
extract it into the proper Windows directory

2) If the missing NPPTools.dll is not the issue, what do I do?

I'm a little confused by this since a Google search for "NPPTools.dll" shows
that it belongs to Nmap, a network security scanner. Nmap doesn't have
anything to do with music files. If you installed Nmap, then somehow you've
associated it with MP3 files. AFAIK Windows Media Player will play MP3
files (although I'm not at all expert in WMP so I may be wrong); you might
also try VLC Player which does play MP3s and is excellent and free.

To change the program association back to WMP (for example), see this
tutorial:

How to Associate a File Extension Type With a Program in Vista
http://www.vistax64.com/tutorials/69758-default-programs.html?ltr=D

Malke