$ mogrify -resize 200x200 *.jpg
mogrify.exe: unable to open image `??????.jpg': Invalid argument @ error/blob.c/OpenBlob/2514.
Magick: unable to open image `??????.jpg': Invalid argument @ error/blob.c/OpenBlob/2517.
$
mogrify.exe: unable to open image `??????.jpg': Invalid argument @ error/blob.c/OpenBlob/2514.
Magick: unable to open image `??????.jpg': Invalid argument @ error/blob.c/OpenBlob/2517.
$
I'll walk you through how to solve this issue.
Solution #1
The latest version at the time of the writing is ImageMagick-6.8.7-4-Q16-x64-dll.exe. It just does not work on images with UTF-8 file name. So let's rename these images to English characters; then we do whatever we need to do with ImageMagick; then we rename the images back to the original names.
If this is a chore to you the next solution is a lot better.
Solution #2
Install ImageMagick-5.5.7-Q8-windows-dll.exe which I have verified to work on images with UTF-8 file name. At least the command to resize images works. If you cannot find this executable on the Internet let me know and I will send the entire executable to you. It is 6249 KB which is about 6 MB.
The downside of course is that it may not have the features that other newer versions have.
Questions? Let me know!