We checked some samples of UPDATE_AD.DLL and detected the file UPDATE_AD.DLL as threat.
Remove the UPDATE_AD.DLL file from your computer right now.
Removal tool: http://www.unhackme.com

UPDATE_AD.DLL Information and Removal:
UPDATE_AD.DLL is known as: packed with ASPack [Kaspersky Lab].
MD5 of UPDATE_AD.DLL = 8D59015B0E2F2182604CE5883041BFFF
UPDATE_AD.DLL size is 25088 bytes.
Full path on a computer: %SYSTEM%\UPDATE_AD.DLL
Related Files:
%SYSTEM%\ASSIST.EXE
%SYSTEM%\DOWNMENU.DLL
%SYSTEM%\HUAYUKE.INI
%SYSTEM%\KOOPING.EXE
%SYSTEM%\LIVABILITY.DLL
%SYSTEM%\UPDATE.EXE
%SYSTEM%\SOFTSET.INI
%SYSTEM%\TIPMESSDLL.DLL
%SYSTEM%\TOP_UP.DLL
%SYSTEM%\UNINST.EXE
%SYSTEM%\UPDATEFILE.EXE
%SYSTEM%\UPDATE_AD.DLL
%SYSTEM%\UPMENU.DLL
%SYSTEM%\XMLCONFIG.INI