As per my previous article here - Using Apple Lossless (aka. ALAC) in Windows the situation is unchanged for Windows 7, 8, or 8.1 however if you are currently testing Windows 10 or plan to upgrade to it when it is released then there is significant news for you.
Microsoft with Windows 10 have added official built-in support for a number of additional music and video formats and this includes Apple Lossless. This is provided in the form of a brand new MediaFoundation codec, both 32-bit and 64-bit versions are included. In fact there seem to be both decoding for playback and encoding versions provided although at this point I have not found any way to utilise the encoding versions. Playback is of course via Windows Media Player.
Furthermore with a subsequent update to Windows 10 preview Microsoft have also fixed the deliberate crippling of Apple Lossless files which previously resulted in such files being moved to the 'other' section of the Windows Media Player library. Apple Lossless files now correctly end up in the 'music' section at least in Windows 10. The previous workaround using WMPTagPlus is still needed for Windows 7, 8, and 8.1.
As a result of these two changes it is no longer necessary to install any additional software at all in Windows 10 and you can now straight away fully utilise Apple Lossless files. As before Windows Media Player still is able itself to read the meta-tags in these files including any embedded album artwork.
One of the supposed benefits of using a MediaFoundation codec over a DirectShow equivalent is that MediaFoundation codecs are supposed to support the ability to use the 'play-to' feature in Windows Media Player so that you can stream the music to a compatible DNLA client device. With DNLA being in my opinion a poorly designed and implemented system and with very few DNLA clients supporting Apple Lossless I have not yet been able to confirm whether this works for Apple Lossless files. If anyone else has had success please post a comment detailing what DNLA client you successfully tested an Apple Lossless file with.