There have been quite a few folks developing CODECs that work with WindowsCodecs CODEC extensibility. Since the Dec. CTP (maybe sooner), one popular question that has come up is that when trying to use WICExplorer to load up the image, you get a component not found error. The reason behind this is that there is a check to see whether the binary that has the CODEC is signed by a certificate that's installed on the system. Once you sign your binary, then everything should work fine.