When you try to install a Microsoft Game, you find find that you are unable to and you receive error  messages. This could probably be because your InstallShield application could have become corrupted or  damaged.

The error message you receive as after you start the installation could be any of the following two:

Error -1607: Unable to install InstallShield Scripting Runtime

Error – 1628: failed to complete installation

In such a case, you can download and apply Microsoft Fix it 50639 from KB910816.

This fix is meant for the following games: Microsoft Flight Simulator X Deluxe, Microsoft Flight Simulator X Standard, Microsoft Age of Empires III, Microsoft Age of Empires III : The WarChiefs, Microsoft Dungeon Siege II, Fable: The Lost Chapters PC, Microsoft Age of Empires III: The Asian Dynasties, Microsoft Flight Simulator X Acceleration Expansion Pack, Microsoft Flight Simulator X ServicePack 1, Microsoft Gears of War (PC), Microsoft Halo 2 for Windows Vista, Microsoft Shadowrun (PC), Microsoft Viva Pinata (PC), Microsoft Zoo Tycoon 2, Microsoft Zoo Tycoon 2: African Adventure, Microsoft Zoo Tycoon 2: Dino Danger, Microsoft Zoo Tycoon 2: Endangered Species, Microsoft Zoo Tycoon 2: Marine Mania, Microsoft Zoo Tycoon 2: Ultimate Collection.

Hope it helps!