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C. Method Compatibility
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Since the purpose of the guide is to clean the DATA section, it is important to choose a clean RGN Engine firmware from the Intel Engine Firmware Repositories thread and not EXTR which is extracted from various SPI/BIOS images/dumps and considered dirty as far as the DATA section is concerned. Moreover, a full RGN Engine Region is required and not an Update (UPD) image. That means that you should look only for Engine firmware of this structure at the Repositories:
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