This fix will restore those required Registry keys. If certain Registry keys are missing, sound will not work in most programs. The fourth fix is one for a specific sound related problem. This is helpful if they somehow got removed. The third fix will re-register the base DirectShow filters of Windows. The Codec Tweak Tool can remove the invalid references. Those keys can for example get left behind when a codec is not properly uninstalled. Such invalid references are Registry keys that for example point to non-existing files. This will perform a scan of the Windows Registry looking for invalid references to codecs and filters. The first two fixes detect broken VFW/ACM codecs and DirectShow filters. If any of the information below is unclear or insufficient, then please let us know. Detailed help is available for each individual function. Below is a short overview of the functionality that this tool has to offer. This tool is a Swiss army knife for managing codecs and codec settings.
