Skip to main content




RECOMMENDED: Click here to fix Windows errors and get the most out of your system performance

Error 0x000000a5 is the stop error, which is further described as the blue screen of death error. Error code 0x000000a5 appears mainly due to a bug in the ACPI BIOS. This error message on your computer screen indicates that the Advanced Configuration and Power Interface (ACPI) BIOS of the computer system is not compatible with your Windows system and is not absolutely certified according to the ACPI specifications.

stop-error-0x000000a5-5100140

Regularly, this will cause a sudden system shutdown or an unexpected reboot of your system. Blue error codes like 0x000000a5 are the most serious and dangerous errors that Windows can encounter.

To fix BSOD error 0x000000a5, try the following methods:

Starting with the last known good configuration

This should be the first thing you should try, because the simplest and most effective answer is to fix the stop error 0x000000a5. Perform the following steps:

  • Restart the computer.
  • Espere a que la computadora complete el procedimiento POST (la información del sistema aparecerá en su pantalla).
  • Press the F8 key until the list of available boot options is displayed.
  • Select Last Known Good Configuration.
  • Press Enter
  • Wait until your computer boots in this mode.

Check if the error persists or not. If you are still facing the error, try the following method.

Using the system restore procedure

system-restore1-3223447

Perform system recovery from the Advanced Options screen if the automatic repair method did not work for you. To do this, you must follow these instructions:
After starting your computer with a Windows DVD disc or a system repair disc, a black screen appears with the gray text “Press any button to boot from CD or DVD.” Press any key.
Select an exact time and keyboard type.
Click the Repair Computer icon in the lower left corner of the screen.
Select the “Troubleshooting” icon on the “Choose options” screen that appears in front of you.
Click on the advanced alternatives located in the troubleshooting window.
To finish, basically select the System Restore icon.
I hope your error issue is resolved now, but if there is still a hurdle, please call the technicians at the coordinates below.

Si todo lo demás falla, aquí hay algunas otras cosas para probar que parecen haber funcionado para otras persons:

  1. Check BIOS settings, set USB to USB 2.0.
  2. Set all BIOS supported settings to Legacy and XP/Win7 and not Win8/10 or UEFI.
  3. Reset the BIOS settings to default, then try the previous BIOS settings.
  4. If you have an LPT option in the BIOS for a parallel printer port, try setting it to LPT = Enabled and ACPI & PnP = Enabled and APM = Disabled.
  5. Try disabling ACPI in the BIOS.
  6. Try changing all BIOS CPU alternatives (Safe Execution, VxD, etc.).
  7. You can also try an older version of the BIOS (newer versions may only have been made compatible with Win8/10).
  8. If you have already added additional RAM to the system, reset the memory to its original configuration and size (and test the memory with a memory testing program; the problem may be due to faulty or inadequate memory!

https://www.dell.com/community/Laptops-General-Read-Only/STOP-0x000000A5-ACPI-error-during-fresh-winxp-win7-installation/td-p/4467233

RECOMMENDED: Click here to fix Windows errors and get the most out of your system performance