BSOD 0x70 (SOFT_RESTART_FATAL_ERROR): causes and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Windows hit a fatal condition during a soft restart or warm reboot path.

Could be also:
Constant	Type	OS
ERROR_DISK_FULL	Win32 error	Windows
EHOSTDOWN	errno	Linux
EINPROGRESS	errno	Windows
SESSION4_INITIALIZATION_FAILED	BugCheck Code	Windows

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SESSION4_INITIALIZATION_FAILED	SESSION5_INITIALIZATION_FAILED

SOFT_RESTART_FATAL_ERROR

Soft restart failure for SOFT_RESTART_FATAL_ERROR

SOFT_RESTART_FATAL_ERROR is bug check code 0x00000070.

This code is tied to restart transition state rather than normal runtime execution. It is useful when the system crashes while rebooting, resuming a restart flow, or switching between boot phases without a full power cycle.

How to read it in a dump

Correlate the dump time with shutdown, restart, firmware handoff, or update installation.
Power and boot-transition drivers are more relevant than ordinary foreground applications.
The stack should show whether the failure occurred before or after firmware/boot-loader handoff.

What to check

Compare cold boot and warm restart behavior.
Check firmware, chipset, storage, and power-management drivers.
Look for pending-update and boot-status logs around the failed restart.

References

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