WMP and File Explorer show mp3s as "unknown"

Hopefully someone can help with this odd problem.
Everything was fine until the other day.

Then I noticed that a few songs in Windows Media Player were no longer showing Artist or Album info.
So I rebuilt the WMP library, and now NONE of my mp3s have ANY info. But m4a files do.



And this is also a problem in File Explorer.


But when I look at the mp3s in Mp3tag all the info is there as ID3v2.3 tags.

Any ideas?



WMP: v12.0.7601.23930

Tech Support Guy System Info Utility version 1.0.0.4
OS Version: Microsoft Windows 7 Professional, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz, Intel64 Family 6 Model 45 Stepping 7
Processor Count: 12
RAM: 32718 Mb
Graphics Card: NVIDIA GeForce GTX 570, 1280 Mb
Hard Drives: A: 0 GB (0 GB Free); C: 465 GB (63 GB Free); E: 1862 GB (692 GB Free); F: 3725 GB (246 GB Free); G: 3725 GB (2424 GB Free); H: 3725 GB (448 GB Free); I: 931 GB (375 GB Free); J: 0 GB (0 GB Free); L: 3725 GB (1244 GB Free);
Motherboard: ASUSTeK COMPUTER INC., P9X79 PRO
Antivirus: Avast Antivirus, Enabled and Updated

 

Also, all the info displays OK in VLC:

 

Are you able to edit the information within File Explorer? Assuming not, from what I've found so far, it could be corrupt Windows files and simply running SFC /scannow could resolve the problem.

 

Hi Oddba11,

No, I don't seem to be able to edit the fields in File Explorer.

And perhaps I should have put in my original post, that I have already run SFC /scannow and it didn't find any problems. And didn't fix it.