You can get the update in several ways. You may be prompted to install the update the next time you start the IDE or you can run Check for Updates under Embarcadero RAD Studio XE2 in the Windows Start menu.
You can also get the update and more information here:
- Update 2 for Delphi XE2, C++Builder XE2 and RAD Studio XE2
- Delphi XE2 and C++Builder XE2 ISO with Update 2
- Fix list for Delphi XE2 and C++Builder XE2 Update 2
- Release Notes for Delphi XE2 and C++Builder XE2 Update 2
We also just recently (yesterday) released Help Update 1 for Delphi XE2 and C++Builder XE2
And finally, if you're a RAD Studio user, you can download Update 2 for the RadPHP XE2 part of RAD Studio XE2.