Can windows media player sync ACC files?

Hello dale12345, 

Windows Media Player does not support .acc files. You can follow the below link that will give you information on the file formats supported by Windows Media Player 11:

http://support.microsoft.com/kb/316992

Since .acc is the file format for I-tunes you might need to download Third party software like I-tunes to be able to play these files.

THIRD PARTY SOFTWARE DISCLAIMER:
Using Third Party Software, including hardware drivers can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the use of Third Party Software can be solved. Using Third Party Software is at your own risk.

I hope that this information helps.

Thanks,
Irfan H, Microsoft Answers Support Engineer. Visit our Microsoft Answers Feedback Forum and let us know what you think.