Summary

Windows* error code 0xc00000e9 is a common Windows Boot Manager* error that indicates either a hardware failure or a corrupted system file encountered during the boot process. It appears shortly after the computer starts, but before the Windows* login screen, as follows:

• An unexpected I/O error has occurred. Error code: 0xc00000e9

The 0xc00000e9 error code always has to do with the boot process for Windows*. An I/O error, or input/output error, occurs when the system is unable to access a drive or disk, which means it cannot read or copy data. Because it's common, there are many reasons why the error might appear:

• Malfunctioning external hardware or PC components
• Damaged I/O ports
• Incorrectly seated components such as a disconnected hard drive that doesn't make contact with the motherboard
• Improperly configured UEFI, BIOS, or CMOS settings
• Corrupt system files or Windows* Registry problems
• Problems with Windows* Update
• A boot sector virus or other malware

There are several troubleshooting steps to fix this issue, including:

• Boot into safe mode and scan Windows* for errors.
• Perform a Windows* Startup Repair.
• Scan the PC for malware or other issues.

You could also contact Microsoft* Support team for more guide, or try to re-install Windows® 10, following the steps below:

Note	Be sure to back up all the information on your computer before reinstalling.

1. Go to the Download Windows® 10 page.
2. Click "Download tool now."
3. Once the download for the tool completes, click to expand "Using the tool to create installation media (USB flash drive, DVD, or ISO file) to install Windows® 10 on a different PC" and follow the instructions given.

If all the steps above do not solve the issue, try some swap tests with motherboard or other hardware.

Questions? Check out our Community Forum for help.

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