Fixed: Inaccessible Boot Device on Acer Laptop (4 Ways)

You can learn why error Inaccessible Boot Device on Acer occurs and how to solve this problem with 4 top solutions. And you can backup your system to prevent data loss.


By Miya Updated on July 19, 2023

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User Case: Stuck at Inaccessible Boot Device BSOD After Updating

Hi! I just want to ask for any help with regards to my Acer Aspire 5, which is stuck at Inaccessible Boot Device BSOD after updating. Since after the restart, the laptop booted into the Acer logo with a progress bar, instead of the usual Windows loading screen......And now I am stuck. Hopefully, some experts here can provide some help before I concede.

                                                                                                                                                                                                                       - Questions form Acer Forum Forum

Inaccessible Boot Device Windows 11 SSD

If you are experiencing error Inaccessible Boot Device on Acer laptop like this user, then you need not worry! This article provides four ways to fix this error and also recommends a backup program to back up and do system restore on Acer to prevent data loss, so read on!

Why Error Inaccessible Boot Device on Acer Occurs?

The Inaccessible Boot Device error on Acer computers can occur due to a variety of reasons, such as:  

  • Corrupted or outdated device drivers
  • Hardware malfunctions
  • Issues with the operating system

Some other common causes of this error include conflicts between hardware components, outdated or incompatible drivers, issues with system files, or problems with the boot sector of the hard drive. Other factors that can contribute to this error include malware infections, hardware failures, or recent updates or installations that have caused conflicts within the system.

How to Solve Inaccessible Boot Device on Acer Laptop with 4 Ways

To resolve this issue, it may be necessary to reset the Bios configuration, roll back Windows updates, perform Startup Repair, or run Check Disk scan, etc. In some cases, it may also be necessary to replace faulty hardware components to fully resolve the issue. 

In this section, we will discuss how to fix Acer laptop Inaccessible Boot Device error with 4 useful ways.

Way 1. Reset the BIOS Configuration

As per feedback from some users, enabling the AHCI mode in BIOS can be an effective solution for fixing the Acer Aspire 5 Inaccessible Boot Device error. To enable the AHCI mode, follow these steps:

Step 1. Restart your computer and press F2/DEL to enter the BIOS settings during the startup process.

Step 2. Navigate to the Advanced Options menu and change the mode of Configure SATA as to AHCI.

Reset BIOS Configuration

Step 3. Save the changes by pressing F10 and exit the BIOS.

Way 2. Roll back Windows Updates

The Acer Nitro 5 Inaccessible Boot Device error can also occur after a system update, in which case rolling back to a previous version may help resolve the issue. To roll back to a previous version, follow these steps:

Step 1. Select Troubleshoot > Advanced options > Uninstall Updates from the WinRE.

Step 2. Choose the update you want to uninstall, follow the on-screen instructions, and wait for the process to complete.

Uninstall Updates

Way 3. Perform Startup Repair

Windows Recovery Environment (WinRE) is a built-in recovery tool that can help repair common causes of unbootable operating systems. If you're experiencing an Acer device Inaccessible Boot Device error on startup, you can try booting into WinRE to fix the issue using the following steps:

Step 1. On the startup screen, shut down your computer three times in a row to enter WinRE.

Step 2. Select Troubleshoot > Advanced options > Startup Repair.

Startup Repair

Way 4. Run Check Disk Scan

Check Disk is a tool that scans your hard disk for errors and corrects them. Keep in mind that while CHKDSK is running, it takes over the hard disk and doesn't allow other programs to run until it's complete. Therefore, it's important to run CHKDSK when several hours of downtime are acceptable. To run CHKDSK, follow these steps:

Step 1. Open the Start menu and search for cmd. Then, right-click on Command Prompt and select Run as administrator.

Step 2. Type chkdsk /f /r C: (replace C with the drive letter of the disk you want to check) and press Enter. CHKDSK will scan for drive errors and let you know if it found any that need to be repaired, but it won't try to fix them without a command.

Check Disk Scan

Step 3. When prompted to check the disk the next time the system restarts, press Y.

Step 4. Restart your computer to check if the issue has been resolved.

How to Backup Your Acer Before Inaccessible Boot Device Error Occurs

Dealing with the Inaccessible Boot Device error on Acer device can be a frustrating experience. If the above methods have failed to resolve the issue and you don't want it to interfere with your daily computer use, it's time to consider using professional third-party software to back up your laptop.

I highly recommend AOMEI Backupper Standard, which is a reliable and free backup software. The system backup it creates provides an extra layer of security for your important data, allowing you to quickly restore your computer to a previous stable state if needed.

Here are some of the features of AOMEI Backupper Standard:

✿ This software offers Backup features including System Backup, Disk Backup, Partition Backup, and File Backup. 
✿ It supports various backup locations, such as backing up Acer to USB drives, NAS devices, external hard drives, etc.
✿ It is highly compatible with Windows PC operating systems such as Windows 11, 10, 8.1, 8, 7, Vista, and XP.
✿ It allows you to use incremental or differential backup to optimize backup efficiency compared to Windows' built-in tool. (Differential backup is available in the paid edition)

To create a system backup on Acer, follow these graphical steps:

Step 1. Download AOMEI Backupper Standard, install it, and launch the program.

Download FreewareWin11/10/8.1/8/7/XP
Secure Download

Step 2. Navigate to the left panel and click on Backup. Then, select System Backup from the available options.

System Backup

Step 3. Once you've selected System Backup, the program will automatically choose the system-related partition(s) as the source data. All you need to do is select a destination path to save the backup.

Select Destination Path

Tip: This software has the ability to run scheduled backup tasks with options including Daily, Weekly, Monthly, Event triggers or USB plug in. Additionally, you can even wake your computer to run the scheduled task.

Step 4. Click on Start Backup to begin the process of backing up your Windows system on Acer.

Start System Backup

Once you have created a system image backup, you can use it to restore your Acer device to a previous state when needed.

☄ Tip : If your Windows system has crashed or is unable to boot up correctly, you can use Create Bootable Media of AOMEI Backupper under Tools to restore the system backup you previously created, even without Windows.

Create Bootable Media


These are the four potential solutions for the Inaccessible Boot Device error on Acer laptop. You can try them one by one to see if any of them resolve the issue. However, if you want to avoid dealing with system problems in the future, it's recommended to backup your Acer automatically.

AOMEI Backupper is a reliable and free software that can create a system image backup of your computer in advance. This system backup can be used to restore your computer to a healthy state in case you encounter similar system errors in the future.

In addition, it can also transfer your files or data between computers. For example, you can easily transfer data from Windows 8.1 to Windows 11. This software has many powerful features waiting for you to explore. Give it a try and see for yourself!

Miya · Editor
Miya has an excellent insight and receives professional and systematic technical training since joining AOMEI. She has a comprehensive understanding of computer issues, aiming at helping users troubleshoot all kinds of problems. A lot of computer users around the world have found her articles very helpful!