MS Windows build of Steem v0.12.2 is released.
https://github.com/btscube/steem/releases/tag/v0.12.2
You will need Visual C++ Redistributable Packages for Visual Studio 2013 . Download it here - https://www.microsoft.com/en-us/download/details.aspx?id=40784
Changes made in this release:
Performance improvements especially in memory management
Hard limit to address oversized blocks and transactions