Fix 0x000000a5 Blue Screen Stop Error

Error 0x000000a5 is a Stop error, also known as a blue screen death error. Error code 0x000000A5 appears mainly due to ACPI BIOS error. This error message on your computer’s screen indicates that the BIOS of your computer’s Advanced Configuration and Power Interface (ACPI) system is incompatible with your Windows system and is not fully certified with the ACPI specifications.

Usually, this will lead to a sudden system shutdown or unexpected system restart. Blue error codes such as 0x000000A5 are the most serious and dangerous errors that Windows may encounter.

The cause of the 0X000000A5 stop error (BSOD)

  • Incorrectly configured, old or damaged device drivers.
  • Damaged Windows registry due to recent software changes.
  • Drivers conflict after new hardware installation.
  • Due to memory corruption (RAM).

BIOS is a set of software. This software was used by the operating system to communicate with hardware devices on your computer. ACPI is part of the BIOS and Windows operating system. It is a standard in BIOS operation.

The presence of ACPI in the BIOS of a particular Windows system determines whether the system can fully utilize functions such as power management or plug-and-play.

Here’s what happens: Traditionally, the ACPI BIOS implementation tries to manage hardware resources directly through the BIOS code to provide hardware functionality. However, if the ACPI based BIOS is not compatible with the ACPI in your system, it may not maintain a functional link between the operating system and the hardware.

This creates an imbalance because operations cannot be synchronized, resulting in system shutdown, system instability and machine failure. 0x0000000A5 is displayed on the screen as a stop error warning.

Boot In Last Known Good Configuration

This should be the first thing to try as it is the easiest and most effective solution to fix Stop 0X00000024 error. Follow the instructions below:

  • Reboot your computer.
  • Wait until the computer has finished the POST (system information will be displayed on your screen).
  • Press the F8 key several times until you see a list of available boot options.
  • Select “Last successful configuration” (your last working settings).
  • Press Enter
  • Wait until your computer starts up in this mode.

Check if the error is saved. If the error persists, try the following method.

Perform a system restore

You can use System Restore to remove and disable the latest software and drivers. This will determine if one or more of your new programs may have clogged up your system. To open the System Restore dialog box, download an MS Windows installation DVD (or bootable USB flash drive). Instead of choosing a clean installation, click the “Restore” icon and follow the instructions to complete the installation.

Check your hardware devices

If none of the above steps help, you may need to remove all external hardware from your PC before trying again. Depending on your specific case, you may need to remove recently added RAM modules (if any), as faulty memory keys may also cause BSOD. Finally, you can try to change the ACPI BIOS settings to check for inconsistencies in the default settings.

Update your BIOS to the latest version

In fact, in the vast majority of cases, this particular problem is caused by a mismatch in the BIOS. This termination code usually indicates that the BIOS version is incompatible with the Advanced Configuration and Power Interface (ACPI) supported by Windows 7.

If this scenario is applicable, the problem should be resolved by upgrading the BIOS version to the latest available version. Please note, however, that due to the fact that the BIOS interfaces of different motherboard manufacturers differ greatly, it is not possible to provide you with step-by-step instructions.

The best way to get specific instructions on how to update the BIOS version is to search the Internet for “BIOS Upgrade + Motherboard Model” and carefully read the documentation on the official website.

Please note that most motherboard manufacturers offer their own utilities for BIOS update. Therefore it is important to follow the instructions carefully. Asus has E-Z Flash, MSI has MFlash, etc.