My brother tried to play Guitar Hero 3 Legends of Rock (on pc) but it just says "There was a problem finding or creating one of the game's stantard registry entries. Please contact Aspyr customer support.", I can't uninstall it or use setup because it says that the files are broken and there isn't Guitar Hero III on Add or Remove Programs? It worked fine yesterday, but today it says that. Somekind of Registration file would be nice, or what should i do?

Video Game Consoles & Games - RedOctane - Guitar Hero III: Legends of Rock