How to convert copyrighted WMA to MP3

I am such a newbie at this, ..... but here goes... I downloaded the trial of Virtuosa, and attempted to convert my 209 WMA files to MP3's, however, a message window pops up saying that the files are copyrighted . I have no idea what this means, or how to fix it. All I want to do is to convert them to MP3 format, so I can have a CD with most, if not all, of those songs on it. I downloaded dBpowerAmp, and the codec it said I needed (no idea what that is or how to use it though) and it says the files can't be converted because they are encrypted. So, I am frustrated. I just want to convert all of my store-bought CD's to MP3's for long trips,(with my 3 kids),so that I am not frequently changing CD's. Anyone who can offer me step-by-step help, please........help........thank you. And, please feel free to email me with this help too, it's greatly appreciated.

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• Well, SoundTaxi works great with protected WMA music files. It can convert copyrighted WMA to MP3.
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• record copy-protected music, audio books and video clips in WMA, M4A, M4P, AA, M4B, WMV and M4V formats by playing them and save them as unprotected MP3, OGG, WMA, WMV or MPEG4 files you can use anywhere!
• unprotects practically all DRM audio files
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• preserves ID3 tags for artist, album, title names etc.
• batch mode for converting or unprotecting large song collections
• allows to convert complete folder structures and recreates these structures on output
• selectable compression level and output format
• super fast conversion, up to 20x the playback speed
• can convert in HIFI and CD quality