ACPI_BIOS_FATAL_ERROR
What is this error?
The BIOS reported a fatal ACPI error to Windows. More severe than ACPI_BIOS_ERROR — the BIOS itself signals that a critical failure occurred.
Common causes
- critical BIOS bug
- incompatible BIOS version for hardware
- BIOS corruption
- hardware compatibility issue
- thermal emergency reported via ACPI
How to fix it
- Update BIOS urgently
- reset BIOS to defaults
- check CPU/motherboard compatibility
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
Bug check 0x000000E0 (ACPI_BIOS_FATAL_ERROR) means the BIOS itself reported a fatal error to Windows. This is more severe than a regular ACPI error — the BIOS is saying something is critically wrong.
This can happen with new hardware on outdated BIOS, or when the BIOS encounters a thermal or power emergency.
How to fix it:
- Update BIOS to the latest version from the motherboard manufacturer immediately
- Reset BIOS to factory defaults (Load Optimized Defaults in BIOS setup)
- Check CPU compatibility — your CPU may require a newer BIOS version
- Check CPU temperature — some BIOS versions trigger ACPI fatal errors when thermal limits are exceeded
- Remove any overclock settings and test at stock
- If the BIOS was recently updated and this started, try the previous BIOS version (if your board supports BIOS flashback)
- Disconnect unnecessary hardware temporarily to isolate the issue
- If the board is new, check for BIOS updates that add support for your specific CPU model
When to seek help
If this error keeps happening after trying the fixes above, it may point to a deeper hardware or system issue. Consider professional help if:
- The crash occurs across multiple games or applications
- You see the same error after a clean Windows install
- Your PC is less than a year old (could be a warranty issue)
- You smell burning or hear unusual sounds from your PC
Or let Crashless do the deep analysis for you -- our AI checks drivers, temps, event logs, and 400+ known patterns automatically.
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