You can, with the right software, but you'd be much better off just re-ripping them into MP3. There are two primary reasons for this. The first is that every time you reencode a file, the quality is a little worse. The second is that WMA is pretty notoriously bad to begin with, so you'd be best served by just going back to the source and starting over.
In the past I have ripped some cd's onto my computer in WMA format. Recently I wanted to add them to a mobile devise but it will not accept WMA files. It will accept MP 3 files. I have checked the help files on windows but they are no help. Is there a way to convert these files to MP3 format.
I am running Windows 7 home premium