An unexpected I/O error has occured.File:\Boot\BCD

Hi  Agnes15,

Thank you for visiting Microsoft Answers.

It seems that the Boot Configuration Data (BCD) is corrupted.

Microsoft has completely reengineered the boot environment for Microsoft Windows Vista to address the increasing complexity and diversity of modern hardware and firmware. One aspect of this reengineering is a new firmware-independent data store that contains configuration data that influences the boot process. This paper provides an overview of this configuration data - called boot configuration data (BCD) - and describes how to use the related tools to manage boot options.

Step 1

Perform chkdsk which will repair the bad sectors of the hard drive.

To do this, follow these steps:

1.       Click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.

2.       Type chkdsk/ f, chkdsk/r, chkdsk/i, chkdsk/c in the commands listed below  i.e. (/f, /r , /i, /c).

Step 2

Try to load BIOS to default and check if you have similar issue.

Step 3

I would suggest you to rebuilt BCD. To do this, follow these steps:

To run the Bootrec.exe tool, you must start Windows RE. To do this, follow these steps:

1. Put the Windows Vista or Windows 7 installation disc in the disc drive, and then start the computer.
2. Press a key when you are prompted.
3. Select a language, a time, a currency, a keyboard or an input method, and then click Next.
4. Click Repair your computer.
5. Click the operating system that you want to repair, and then click Next.
6. In the System Recovery Options dialog box, click Command Prompt.
7. Type Bootrec.exe, and then press ENTER.

8.       Type bootrec /RebuildBcd , and press Enter.

For more information refer the link given below:

How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and repair startup issues in Windows

http://support.microsoft.com/kb/927392

Hope the information helps. Please post back and let us know.

Regards
Debleena S
Microsoft Answers Support Engineer.

After I put in bootrec/rebuildbcd I get a screen saying "Successfully scanned windows installations. Total identified windows installations: 1 [1] c:\windowns Add installation to boot list? Yes<y>/No<n>/All<a>: 

Which am I suppose to hit?

 I get a message
"Windows has encountered a problem communicating with a device connected to your pc.This error can be caused by unplagging a removable storage device...,or by faulty hardware such as a hard drive or CD-ROM.Make sure any removable storage is properly connected and then restart your pc.

File:\Boot\Bcd
Status:0xc00000e9
Info an unexpected I/O error has occured."

same problem for me too, the solution given by Debleena S does not help because when I get to System Recovery Options screen,no systems come up to select for repair/recovery

What can I do???????? Please help!

Our three week old Dell T160 server running windows server 2008 is experiencing the same issue.

The SAS 6i6 Controller failed, thus corrupting the mirrored pair.

Recommendation: replace  your hard drive(s).

Drive 0, Media Error and Drive 1, in a failed status.

Hello

Both my wife’s and my laptop came with windows 7 preloaded on them so I don’t have CDs to boot from.  My question is it possible to copy the Boot\Bcd file from her computer and install it onto a flash drive to boot my computer.

Thanks