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Hi- Just wanted to see if anyone's come across something similar to the issue I'm seeing. We were using USB boot media initially to deploy Windows 10 and everything was golden. But now, we are starting to implement PXE boot, the UEFI enabled computers are getting formatted as MBR. The smsts logs stating that "Property IsUEFI is now = False". Checked the BIOS > UEFI enabled > Legacy Options Roms enabled > No secure boot Any ideas? I wasn't the one who built the task sequence and the disk formatting options tab has the condition: Variable:_SMSTSBootUEFI Condition: equals Value: true I've even tried changing this to use WMI query: Select * from Win32_ComputerSystem where Manufacturer like "%Dell%" Still it fails to set partition the drive as GPT and subsequently ends up being MBR. ========= tl:dr >SCCM 2012 1606 deploying Windows 10 >Used USB boot media on UEFI enabled devices = ALL OK > PXE boot same UEFI device > Task sequences partitions drives to MBR > No bootable devices found > switch BIOS to MBR = Boots Ok > WTF??!! Thanks.