Nowadays, computers are increasingly powerful and useful so they allow us to carry out all kinds of tasks. However, they are not without errors, many of which are produced by Windows. One of the problems that we can find when starting our PC is that the message Error ACPI_BIOS_ERROR appears that is usually accompanied by the value 0x000000A5. If you ever come across this error, we will show you what are the causes for which it may appear and how to solve it.
What is the APCI
APCI is short for Advanced Configuration and Power Interface . It is an advanced configuration and power interface, developed by large companies such as Intel and which is responsible for controlling the operation of the BIOS, creating mechanisms that are responsible for managing and saving energy. In this way, a much faster logon and shutdown is achieved without inconvenience or hardware problems.
What is the APCI error in the Bios
As we have commented, the APCI takes care of the proper functioning of the startup and shutdown of our PC. If the Error ACPI_BIOS_ERROR message appears on a blue screen, it may be accompanied by an involuntary reboot of the system. This error will cause the system to stop some functions and these cannot be used normally, making Windows run slower, as well as blocking a program identified with Error 0xA5 or Error STOP 0xA5: ACPI_BIOS_ERROR. In addition , these types of errors can even prevent Windows 10 from starting , so it is important to solve it as soon as possible.
The causes of this error can be several since it is not based only on a specific error. That is why we can skip this error if we have problems with a driver or that they are damaged or obsolete. It can also be due to a corrupted registry entry, that we are infected by some malware, that we have corrupt system files or some error in the hard disk or RAM, to name the most common.
How to fix the ACPI_BIOS_ERROR Error
Update drivers
Using outdated or incompatible drivers can cause the ACPI_BIOS_ERROR Error to appear, so it is important to keep them up to date. Drivers are generally downloaded automatically and installed through Windows Update. But sometimes there may be drivers that are not updated so we can also check it manually.
To do this we will write “device manager” in the Windows Start menu and select it. Next, we right-click on a device that we want to update. We select the option “Search automatically for updated driver software” and then “Update driver”. In case Windows is unable to find a new driver, we can search directly on the manufacturer’s website.
You can also use some software to download drivers like Driver Genius Professional or IObit Driver Booster . This type of program is in charge of searching for and downloading all the driver updates for our equipment, thus saving us from having to search for them ourselves.
Keep Windows 10 updated to the latest version
As with drivers, it is also very important to keep Windows 10 updated to its latest version. If we have pending updates, it may include a new update for the BIOS of our computer so we must proceed to install it as soon as possible.
To check if we have pending updates, we will write windows update in the Windows start menu and select it. At the top of the new window we will find the option to “Check for updates”. We click on the button and wait for the system to look for a new update. In the event that this is the case, we will proceed to download and install it .
Check RAM status
The bad state of the RAM memory can also cause the appearance of the ACPI_BIOS_ERROR Error. To check if the RAM is in good condition, Windows 10 has a native tool called Windows Memory Diagnostics that allows us to perform diagnostics of it.
To access it, we must write Windows memory diagnosis in the Start menu bar and then select the tool. When we run this application, a window will appear asking us if we want to check if there are RAM memory problems on our computer now. To do this, we must restart the computer, at which point we will see a blue screen that will show us the progress of the process and will inform us in case it finds a problem in the RAM of our PC. Once the process is finished, the PC will restart again and it will show us the results obtained. In case of problems with the RAM it is recommended that we proceed to its replacement.
Check for any hard drive errors
An error or bad condition of the hard disk of our computer can also be the cause of the ACPI_BIOS_ERROR Error, so it is convenient to check its status. For this we will use the native tool that we will find in Windows 10 such as “chkdsk” or “error checking tool”.
To start updating it, we must open Windows Explorer and click on This computer in the left column. Once selected, we right-click on our hard drive and a drop-down menu will appear. Now we will click on the “Properties” option.
Next, in the new window, click on the “Tools” tab and then on the “Check” button in the “Check errors” section. Now we will carry out a manual check by clicking on the “Browse drive” option. With this, the PC will begin to check the hard drive and check for any errors. In case of finding an error, it will ask us to restart the computer to proceed to solve the problems found. In case it is not able to solve the problem, we must replace the hard disk to avoid errors and operating problems.
Reset BIOS and disable ACPI mode
In the event that we cannot start Windows due to the Error ACPI_BIOS_ERROR message, it may be due to a BIOS configuration problem , so we must proceed to reset the BIOS to its default value and deactivate ACPI mode. For this we must access the BIOS . To obtain detailed instructions on how to enter the BIOS it is convenient to review your motherboard manual and if in doubt it is best not to touch anything and skip this step.
Sometimes it will be enough to press and hold the F2 or Delete key, depending on each brand, at the time of starting the computer. Once we have accessed the BIOS screen we must choose the Restore defaults option. Once we do this, the BIOS settings of our computer will return to the default. From here we can also disable ACPI mode. To do this, from the BIOS we must access the power settings and, from there, disable ACPI mode .
Reset the computer
If none of the above has helped to solve the ACPI_BIOS_ERROR Error, we must consider the possibility of performing a reset of the entire computer . In this way, the system will take care of formatting the computer and performing a clean installation of Windows, which should be able to solve the error.
To do this we will press the keyboard shortcut Win + I to access the “Settings” menu. Later we click on “Update and security”. Next, we select “Recovery” and finally “Reset this PC”.