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Mixing 32 and 64-bit components in a single MSI

Definetely one my pet peeves about Windows Installer is how it deals with instruction set architectures (ISAs). Looking at Windows NT history, supported ISAs have come (amd64, IA-64) and gone (Alpha, PowerPC, MIPS) – yet most of the time, there was more than one ISA being officially supported. Having to ship binaries for multiple ISAs therefore always has been on the agenda for many ISVs. Needless to say, supporting multiple ISAs requires special consideration when developing setup packages and providing separate packages – one for each ISA – has become common practice to approach this.

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