Yes, it might be some new malware on your system.
PLAY_MP3[1]..EXE, Spyware Remove
If you use Google to look for play_mp3.exe you might find some more info.

NEVER run a .exe file that you didn't download, or that you're not sure is safe.

Have you scanned your computer with your AV?? If you don't have any security programs, please look at these...they're free.
Anti-virus
avast!

AVG free

Avira Antivir


Antispyware etc
Spybot S & D (free)

Malwarebytes (free version)

Ad-Aware Free


Always make sure that you're using a good antivirus program. Keep it updated & use it to scan all files that you've downloaded, BEFORE you open them.

If you need more help then you should go to a site that specialises in malware removal.
Spyware Warrior :: Index

Malware Removal - MajorGeeks Support Forums