In this article we will take a deep look into ensuring boot integrity of the platform which in turn boils down to ensuring the integrity of a number of platform components: the integrity of prelaunch and launch components covering firmware, BIOS and hypervisor. Boot integrity is foundational in embodying the notion of a trusted infrastructure. First will be provided an overview of Intel® Trusted Executed Technology (Intel® TXT) as a technology for asserting platform boot integrity. A complementary notion is the concept of trusted compute pools, which is a logical or physical grouping of computing platforms with demonstrated platform boot integrity. Trusted compute pools provide an embodiment to the integrity of the virtual infrastructure which can then enable granular controls, an essential requirement in virtualized data centers.