Emergency boot is performed using XML file from the McAfee's ePO console and using DETech disc.
Emergency boot basically places Windows MBR, boots to Windows desktop. McAfee Agent communicates with the ePO, notifies the ePO about the Windows MBR , not McAfee MBR and eventually replaces and repairs the boot data/PBFS/MBR
If Emergency boot does not work, PC needs to be reimaged.
If your company policy requires PBA screen (preboot authentication) but McAfee PBA is set to disabled by policy, you can enable BIOS start up password for enhanced security.
Hope this answers your queries
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