It’s been a long wait, but Autodesk released service pack 2
for Civil 3D 2012 on Friday. You can apply this update to AutoCAD Civil 3D 2012 running on all supported operating systems and languages. For more
information about what was addressed in the service pack and for installation
instructions consult the readme file. Be sure to install the correct update
(32-bit or 64-bit) for your software and operating system. You can download the service pack from the following link.
Readme (select language version):