You can apply the Service Pack 2 to AutoCAD 2013 running on all supported operating systems and languages. Windows 8 operating systems (Standard, Enterprise and Professional) are officially supported for 32-bit and 64-bit AutoCAD 2013 with Service Pack 2.
This Service Pack can be applied to AutoCAD 2013 installed as a standalone application as well as AutoCAD 2013 installed from the Autodesk Design Suites.
Download page : http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=21764214&linkID=9240618