After installing and removing MadFlac Ogg codec will not work.
I think I have found a potential bug/conflict with oggcodecs_0.81.15562-x64.
I installed madflac 1.8 from http://madshi.net/madFlac.rar, then unintstalled it. I then installed oggcodecs_0.81.15562-x64. The installation appears to works properly, but any flac files will not play.
I realise that this situation might be caused by the madflac codec as I have installed oggcodecs_0.81.15562-x64 in the past when I hadn't installed madflac previously and it worked fine so I have also sent this info to the maker of madflac.