To find out which service packs have been applied to your Autodesk software, use the Windows control panel for uninstalling and changing programs.
For Windows XP, click the Windows Start menu Control Panel Add/Remove Programs Show Updates.
For Windows 7, click the Windows Start menu Control Panel Programs and Features View Installed Updates.
For Windows 8, right-click the Windows Start screen (or use the swipe up gesture from the bottom edge while on the Start screen). Click All Apps Windows System Control Panel Programs and Features Uninstall a Program View Installed Updates.