Set WMP back to the 32bit (default) setting in the 64bit Settings Application.
Uninstall the 64bit MPC-Homcinema that you installed.
You need to have a decryption tool such as AnyDVD loaded to deal with the encryption.
DVDFAB has a free tool called passkey-lite
, try that if you do not own AnyDVD already.
Go to the Shark007 Tools page, download and install MPC-Homcinema (32bit)
The above player is pre-configured to use the installed Shark007 codecs.
Open the 32bit Settings Application and set 'Use FFDshow for WVC1 content' on the SWAP TAB
(other things are set automatically when making this selection)
Place a disk into the BD player and the newly installed MPC-HC well automatically start to play the movie. If you need to start the BD playback manually, use the players menu's, File | Open DVD... and browse to the root of the BD such as D:\