The Intel Processor Microcode Update (MCU) Package provides a mechanism to release updates for security advisories and functional issues, including errata. In addition, MCUs are responsible for starting the SGX enclave (on processors that support the SGX feature), implementing complex behaviors (such as assists), and more. The preferred method to apply MCUs is using the system BIOS. For a subset of Intel's processors, the MCU can also be updated at runtime using the operating system. The Intel Microcode Package shared here contains updates for those processors that support OS loading of MCUs. Updating your microcode can help to mitigate certain potential security vulnerabilities in CPUs as well as address certain functional issues that could, for example, result in unpredictable system behavior such as hangs, crashes, unexpected reboots, data errors, etc. To learn more about applying MCUs to an Intel processor, see Microcode Update Guidance.