After obtaining a key on DreamSpark, finally i do the Update on my Windows 2008 SP2 to R2 (Thanks chianf092)... The localization of my system is "en-US", but I had "pt-BR" LP installed... During the preliminary installation phase, the installer said that "pt-BR" LP would not be available after the update (Is OK!). After the upgrade, is not possible install the "pt-BR" LP for R2... I verify on event viewer, and the installation process fails with the unexpected error "0x80070643". I've read about the "possible" incompatibility with the "Grub", i did the removal of ones with the command: "bootrec / fixmbr", the problem persists, and I can not add new LPs. Thanks for any help.