How to fix 0xc00000e9 An unexpected IO error has occurred

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Getting 0xc00000e9 An unexpected I/O error has occurred error on your windows system? Looking for a solution to permanently fix this issue? You have landed at the right place. Let us first see what is this error and what are its root causers before fixing the issue.

0xc00000e9 error is usually caused by a damaged or faulty hard drive. If it is a damaged hard drive, you can send it to a recovery company to recover your data. The process is complicated, but if you never make a backup, that is when you start backing up with lessons learned.

0xc00000e9 An unexpected I/O error has occurred

What is 0xc00000e9 error

When you can't start your computer, your natural reaction will panic as hell. If you find the Windows 0xc00000e9 An unexpected I/O error has occurred error code, you don't need to worry because there are several solutions available. This is a problem that is quite common for Windows users and it's easy to follow instructions to complete it. 

This leads to a blank screen when you try to start your operating system without preventing it from starting. There is also this error scenario that will not allow you to start Windows in normal mode, but it will work in safe mode. You may also receive error 0x80070006 sometimes.

This is due to some computer components that cannot be properly connected to your computer. Error 0xc00000e9 can have other causes, such as incorrect UEFI / BIOS / CMOS settings, damaged hardware or corrupted system files. One way to overcome this problem is to reinstall Windows from a DVD / USB drive. Similarly we have written a full tutorial for issue USB Device Not Recognized.

Root Cause of error 0xc00000e9

In most scenarios, this error directs users to a blank screen when they try to start their operating system. In other cases, users can start Windows in normal mode, but their functions are available in safe mode. This problem occurs for several reasons and we will show it to you so that you can better understand how to fix the 0xc00000e9 error.
The most common reasons for the error 0xc00000e9 is:
  1. Damaged registry file.
  2. There was a problem with the device where you installed Windows (for example, a USB flash drive).
  3. There is no connection between motherboard and Hard Drive.
  4. Damaged hard drive or driver.
  5. Virus.
  6. Error with the version of Windows that was downloaded (Always use Genuine Windows).
  7. System file integrity is damaged.
  8. Disconnect / removable storage devices (USB key, external hard drive).
One reason for this error is a virus. If the malware has infected your PC, it can damage your registry files or data associated with the Start system. Even if you use an antivirus, keep in mind that there is no 100% safe defense. To be on a safer side, we recommend you to keep your windows always updates. But if you are not a fan of windows automatic updates then see this guide.

Problems with your hard drive may be another reason for this malfunction. Hard disks are limited and depend on quality, usage and maintenance. Therefore, if your system starts causing problems and you identify it at the source of a problem on your hard drive, maybe it's time to get a new one!

This problem can also occur if your computer suddenly turns off when you download important updates, which can cause data loss or damage, as well as error code 0xc00000e9 An unexpected I/O error has occurred. Also, some errors can occur if a program or update is not compatible with your operating system. A good general advice is to always pay attention to what you install and remove from your computer.

How to fix 0xc00000e9 error in Windows

Now that you know some reasons for this “0xc00000e9 Unable to Boot Error” you can go to the troubleshooting section. As we mentioned, there is no way to overcome this problem. However, each of these methods proved effective in resolving errors 0xc00000e9 An unexpected I/O error has occurred. These are some of the most common improvements:

Result 1 : Check the compatibility of your device.

If you connected some devices to your computer, such as an external hard drive or USB flash drive, remove them and restart the computer. (keep the mouse and keyboard connected) Talking about USB, there is a similar issue people see with USB connections which is 0x80071771.

If the error solves, reconnect your external device, one by one, and restart your PC. If you receive another error after connecting a particular device, you can identify the problem now. You can replace this device completely from your PC.

Result 2 : Change your BIOS settings

  1. You can try starting your PC with a hard drive to fix 0xc00000e9. Follow the steps below:
  2. Turn off the computer and then press the power button to restart
  3. Press and hold the button to enter BIOS settings, usually the ESC, F2, F12 or Delete keys (see your PC manufacturer or open the user manual).
  4. After you are in the boot option, the first boot device is your hard drive. You can press the arrow keys to select the hard drive and move it to the top of the boot device list.
  5. Save all changes and restart your computer. This will solve your problem.

Result 3 : Fix MBR with Windows PE

0xc00000e9 error can occur when installing Windows without configuring the MBR. Therefore, you must configure your C drive as an MBR to fix 0xc00000e9 An unexpected I/O error has occurred
  1. Connect your external drive or hard drive with Windows PE to your PC.
  2. Start Windows PE and configure your C drive as your primary boot record.
  3. Restart your computer to reinstall Windows to see if the problem is resolved.
That's all we can say about that. I hope the solution will help you. If you have ideas, please comment below and let us know. You can also check what Microsoft community has to say about this error for more details.

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