iTunes M4V files have DRM protection. So the M4V to WMV converter you're looking for must be able to bypass DRM.You can try this DRM Media Converter, it is the best drm removal which can remove DRM license protection and convert iTunes M4V video files to WMV with fast speed and high quality. Following is the details on how to convert iTunes M4V to WMV files, now you can enjoy your iTunes files freely!

Note: There are so many files are protected by drm, so to convert some drm protected files , we always need a professional drm converter to do help.

Steps to convert m4v to wmv bypassing drm:
Step 1: Run and add M4V Files by clicking "Add".
Step 2. Select “ WMV” output format
Click the drop-down list to select the “ WMV” format as you want, and set output folder where your converted files will be placed.
Step 3. Start conversion
Click “Start” button to begin conversion process, that’s all, You have just finished to convert m4v to wmv.