You can apply this update to AutoCAD LT 2013 (with or without SP1) running on all supported operating systems and languages. Consult the readme file for installation instructions and more details on the primary issues resolved by this update. Be sure to install the correct update (32-bit or 64-bit) for your software and operating system.
NOTE: You can also use Autodesk Exchange to install the Live Update Maintenance Patches, which will automatically show the correct Service Pack for your product.
Readme (select language version):