What should I do if my Z820 experiences a BSOD 0x0A or 0xF4 during reboot?

If experiencing a BSOD 0x0A or 0xF4 when booting into Windows ® after a reboot with both a 1394 HDD connected and a network cable, power cycle the system using the system power button (Page 4)

From the official HP Z820 Workstation manual, page 4

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