AutoCAD 2010 Update 2 can be downloaded from:
Published date: 2010-Apr-28
autocad2010update2.exe (exe - 30814Kb)
autocad2010update2x64.exe (exe - 42094Kb)
Readme (html - 64Kb)
You can apply Update 2 to AutoCAD 2010 running on all supported operating systems and languages. Be sure to install the correct update for your operating system.
You do not have to install Update 1 in order to install Update 2. Update 2 includes the most recent fixes, as well as all fixes included in Update 1.