I cannot imagine being so not-in-a-hurry to use WMP to burn a disc...
Unless I'm mistaken WMP uses the native disc burning software in XP/Vista/7...
You can get free burning applications or free applications that include burning capabilities from any of several sources (search cnet & Filehippo) that work better than either WMP or the native burner.
Personally I use (and actually LIKE) the Roxio burning software that's bundled with my upper end (but older) HP desktop or the different version but very similar software that was included on the Dells I manage.
You could buy Roxio in the "light" (and older) versions for ~$20 but there are a host of burning apps in the Free-$20Range all of which work better than the native Windows burner that is used by WMP.
what types of files are you going to be burning? CD-Audio or mp3-CDs?