Suddenly Recorded TV files in Windows 7 WTV format no longer have thumbnails. Files Windows Vista Media Center DVR-MS formats thumbnails yet but WTV format files recored with Windows 7. WTV file to convert a DVR-MS results immediately as the thumbnail appearing normal for DVR-MS files converted and the original file has not yet WTV thumbnail. All WTV files have no thumbnails and all DVR-MS files have thumbnails. The same thing is happening on all my computers running Windows 7. It seems a problem with thumbnails and WTV files only. Maybe KB981770 review is the problem, and that to be good for WTV files.
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