W7 64 - Unnable to play imported media files

Try removing your codec packs. Windows already has most of the codecs you need. Unless you are using Apple or open source (e.g. OGG), you do not need a third-party codec pack.

If the files play from the cd and not from your hard drive it cannot be a codec problem. It would have to be a file structure problem. Download Mediainfo (MediaInfo - Download) to check the structural integrity of the media files that you copied from the cd to your hard drive.

Wait, the above post gave me an idea: the files are corrupting en route from USB to HD. Try transferring another file from the USB drive to your hard drive. Is it readable?

Funny. Try using Teracopy to transfer the mp3s over.

Lets try a different player. I recommend GOM player , please download this and see if it plays your files, this will tell us if the problem is your current player.