Windows error code 0xc00000e9 is a common message in the Windows Boot Manager that indicates a hardware failure or a corrupted system file during the boot process. It appears soon after your system boots but before the Windows login screen, as seen below:
There was an unexpected I/O error. 0xc00000e9 is the error code.
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- The driver is either obsolete or incompatible.
- The system files’ integrity has been compromised.
- The detachable disk was incorrectly connected or disconnected.
- Constant application installation, uninstallation, and reinstallation results in the loss of system files.
- The hard drive is malfunctioning or there is no contact between the hard disk and the system.
- Viruses or malware damage registry files or data that are required for the operating system to boot effectively.
- Open WinRE and go to Troubleshooting -> Advanced Options -> Boot Options.
- To boot into Safe Mode with Networking, press F5 and choose Enable Safe Mode with Networking.
- Start File Explorer. Right-click This Computer and choose Properties.
- Click Control Panel – Home in the pop-up window’s top left corner.
- Then, in the resulting box, click on Programs and Features.
- View Installed Updates may be found under the Uninstall Programs interface.
- Remove the faulty update by right-clicking it.
- Press “Windows + X” and then pick Device Manager from the context menu.
- Expand the Hard Disk Drivers directory and right-click each hard disk drive and choose Update Driver.
- Select Automatically check for driver updates in the resulting window.
- Here comes WinRE. Enter by attempting to start Windows twice in a row without success.
- Navigate to Troubleshooting>Advanced Options>Reflection.
- Enter “sfc /scannow” on the command line. Then wait for the procedure to finish.
If SFC fails to restore system files, you may use DISM by executing the instructions in the sequence shown below.
exe /Online /CleanupImage /Scanhealth
exe /Online /Image Cleanup /Health Restore
Finally, after the transaction is finished, you may close the prompt box and check that the problem has been fixed.
The Windows error number 0xc00000e9 is a common Windows Boot Manager error that indicates a hardware failure or a corrupted system file discovered during boot. As shown here, it appears shortly after the system powers up but before the Windows login screen:
There was an unexpected I/O error. 0xc00000e9 is the error code.
This article’s instructions apply to Windows 10, Windows 8, Windows 7, and Windows Vista.
The 0xc00000e9 error code is always associated with the boot process of Windows. An I/O error, also known as an input/output error, occurs when the system is unable to access a drive or disk and thus cannot read or copy data. Because the error is so common, there are several possibilities:
- External hardware or PC components that are not working properly.
- Input or output ports that have been damaged.
- Components that are incorrectly seated, such as a disconnected hard drive that does not make contact with the motherboard.
- Incorrectly configured UEFI, BIOS, or CMOS settings.
- Corrupted system files or issues with the Windows Registry
- Issues with Windows Update.
- A boot sector virus or other type of malware.
Try the following steps in order until the error is resolved:
Restart your computer. If you are unable to log in to your computer, perform a hard reset by holding down the power button until the machine turns off, then restarting it. Restarting a computer solves a variety of problems. If the error persists, conduct additional research to determine the underlying cause.
Remove all external devices. Remove any external hard drives, flash drives, or other USB devices before restarting the computer. These extra gadgets may occasionally interfere with the boot process. Remove them one at a time to determine which device is faulty.
Scan Windows for errors. If Windows boots successfully after a reboot, use the built-in Windows Error Checking tool and the SFC scannow command to check the hard drive and system files for errors.
The chkdsk command can also be used to run the Windows Error Checker program from the command prompt.
Start in safe mode. When Windows fails to boot, you can usually access the operating system in safe mode. If that works, you can perform several of the troubleshooting steps below from within Windows.
Drivers should be updated. Check to see if all device drivers, particularly those related to I/O ports and storage, are up to date, regardless of whether you can boot into Windows.
Execute a Windows Startup Repair. If you are unable to log into Windows, use a Windows disc or a prepared USB device containing the Windows automated repair tools. A Startup Repair may be used to repair faulty system files, registry issues, and missing material that may be causing this error.
Scan the computer for malware. Use a bootable antivirus program if a virus prevents Windows from booting. Download an antivirus program for Windows on another computer and save it to a bootable disk. Most virus programs include a bootable rescue tool that allows you to scan your system from a command prompt.
Examine the hard drives. The quickest way to do this is to use a free hard drive testing program. If you have access to a command prompt, run the tool there instead of removing the hard disk. Another option is to replace the hard drive with a known-good drive. You could also test the hard drive in a different computer.
Alter the boot order. If you installed a new hard disk, inserted an external drive, or connected a USB device, the boot sequence may have changed. It may also happen if you update the machine’s BIOS. Access the BIOS or UEFI settings on the computer, then ensure that the hard disk where Windows is installed is listed at the top of the boot sequence.
Change the volume boot code to use BOOTMGR. The volume boot code may become damaged or associated with a boot loader other than the Windows default BOOTMGR. This problem should be resolved by updating the volume boot code.
Volume boot code flaws could lead to additional problems, such as Hall.dll failures.
MBR (Master Boot Record) Repair (MBR). The Master Boot Record, like the disk boot code, contains data required for Windows to boot. Because the MBR instructs Windows on which disk and partition to use at boot, restoring the MBR may resolve the problem.
Turn off Windows Secure Boot. The Secure Boot feature may prevent the use of external devices or software with a PC. Deactivate it temporarily to see if it resolves the issue.
Run a system restore. If the problem started after you installed a new device or software, use the Windows system restore function to restore the operating system to a previous state.
A system restoration erases changes made to Windows since the set rollback date, so make a backup of any files you want to keep.
Perform a clean Windows installation. Reinstalling Windows overwrites all system modifications. As a result, damaged or missing system files are restored to good working order.
Examine for component failures. If possible, look inside the computer for anything loose or disconnected. Do the same for any external devices that caused the issue. If you discover a hardware problem, you can either repair it yourself or contact the manufacturer for assistance in getting the computer serviced.
Before you open a computer or other electronic device, make sure it has a warranty. You might be able to get it serviced professionally for free.
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