The primary one is that WMA files are incompatible with my smartphone, so forget that.
- I received the error message "Error 0x80070075 - parameter is incorrect." Apparently this relates to DRM protection, which doesn't apply to audiobooks legally obtained from your local (or online) library.
- The Blog of Mark has great preliminary instructions for finding your own DRM folder and potentially disabling its restrictions. A lot of this entails disabling all the hidden folder filters on your machine.
- After trying those step-by-step procedures and yielding nothing, be sure to download and run the batch file he provides in the Dec. 2008 update. That will take you straight to your extremely well-hidden DRM folder, after unlocking everything in step 2.
- A library in Albuquerque provides the next steps, going into that folder and removing a few very specific files. Only after this was accomplished was I able to run my downloaded WMA files.
I know I could write up more elegant steps to effect this end, but this is the path I followed and it worked well enough. That's the basic material one needs to resolve this problem that shouldn't be a problem.