Loading a Windows "Restore Point" does not affect files (such as Cakewalk project files). It only reverses program and OS changes (so it would/could fix the AV problem without touching your files).
BUT... make absolutely sure that we are discussing that type of restore point. If you load a previous "Image" then it will indeed wipe out any new files or changes to files since the image was created.
So yeah... just make sure you know the difference between the two and how they are executed through the Windows recovery options.
Cheers.