沒辦法的情況下
移除全部的code在重裝
結果發現
K-Lite Codec Pack 版本
3.53 正常
3.65 正常
3.70, 3.75, 3.80 全部不行
看了一下Changelog
不知道是否跟以下紅色變更有關

3.6.5 -> 3.7.0 | (2008-01-23)
* Updated Media Player Classic to version 6.4.9.1 rev. 34
* Updated ffdshow to revision 1805
* Updated x264 VFW codec to revision 721bm
* Updated madFLAC to version 1.7
* Updated FLV splitter to version 1.0.0.4
* Added MONOGRAM AMR splitter (version 0.9.0.1)
* Removed RadLight Musepack filter
* Added MONOGRAM Musepack splitter (version 0.3.1.2)
* Added MONOGRAM Musepack decoder (version 0.9.1.2)
* Changed default MP3 audio decoder from Fraunhofer to ffdshow
* Changed default MP1/MP2 audio decoder to ffdshow
* Minor changes