Automated Startup Repair fails. Cannot find OS Loader.

Anonymous
2009-11-02T14:44:48+00:00

On installation of 'Windows 7', after installing needed drivers, some of which were designed for XP or Vista, on a Toshiba Portege M200 (Tablet PC from 2003) and Windows 7 automatically downloading and installing updates:

Windows 7 can't boot.

It goes directly to the Automated System Recovery and no matter which option I choose it fails to fix the problem.

  1. Sometimes it says it did fix the problem and didn't.
  2. Sometimes it says it failed to fixed the problem and in those cases the Diagnosis and Repair details says as:

Root cause found:

Boot manager failed to find OS loader.

Repair action: File Repair

Result: Failed. Error code = 0x490

Time Taken = 4767 ms

Repair action: Boot configuration data store repair

Result: Failed. Error code = 0x490

Time Taken = 150ms

Repair action: System Restore

Result: Failed. Error code = 0x1f

Time taken = 68489 ms

What is the cause of this? And how do I fix it?

The harddrive is brand new and a full memory check said the RAM was good.

Windows for home | Previous Windows versions | Windows update

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Anonymous
2010-09-23T12:15:39+00:00

I had the same problem on one of our laptops.  This has 2GB of memory so it appears to be related to that and Windows updates.  I did the following from the following Microsoft article which resolved the issue for me http://support.microsoft.com/kb/927392/en-gb.

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 clickNext.
  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.

Note To start the computer from the Windows Vista or Windows 7 DVD, the computer must be configured to start from the DVD drive. For more information about how to configure the computer to start from the DVD drive, see the documentation that is included with the computer or contact the computer manufacturer.

!\[\](http://support.microsoft.com/library/images/support/kbgraphics/public/en-us/uparrow.gif)Back to the top

Bootrec.exe options The Bootrec.exe tool supports the following options. Use the option that is appropriate for your situation.

NoteIf rebuilding the BCD does not resolve the startup issue, you can export and delete the BCD, and then run this option again. By doing this, you make sure that the BCD is completely rebuilt. To do this, type the following commands at the Windows RE command prompt:

  • bcdedit /export C:\BCD_Backup
  • c:
  • cd boot
  • attrib bcd -s -h -r
  • ren c:\boot\bcd bcd.old
  • bootrec /RebuildBcd

/FixMbr The /FixMbr option writes a Windows 7 or Windows Vista-compatible MBR to the system partition. This option does not overwrite the existing partition table. Use this option when you must resolve MBR corruption issues, or when you have to remove non-standard code from the MBR. /FixBoot The /FixBoot option writes a new boot sector to the system partition by using a boot sector that is compatible with Windows Vista or Windows 7. Use this option if one of the following conditions is true:

  • The boot sector has been replaced with a non-standard Windows Vista or Windows 7 boot sector.
  • The boot sector is damaged.
  • An earlier Windows operating system has been installed after Windows Vista or Windows 7 was installed. In this scenario, the computer starts by using Windows NT Loader (NTLDR) instead of Windows Boot Manager (Bootmgr.exe).

/ScanOs The /ScanOs option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, this option displays the entries that are currently not in the BCD store. Use this option when there are Windows Vista or Windows 7 installations that the Boot Manager menu does not list. /RebuildBcd

The /RebuildBcd option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, this option lets you select the installations that you want to add to the BCD store. Use this option when you must completely rebuild the BCD.

After following the above i then ran the following from command prompt:

bootrec /fixmbr

then

bootrec /fixboot

This resolved the issue for me and allowed me to log on to the PC in its previous working state.  Great stuff.

Hope this works for you!

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  1. Anonymous
    2013-10-14T23:22:48+00:00

    have the same problem with windows 7 pro 32-bit on my dell dimensions 8200 its the second hard drive its installed on and after system mechanic pro finished its total repair thing optimizing the drive and stuff it shut down and i turned it back on later and it just gave start up repair and failed to find os loader had this problem and another before on it every time i tried having windows 7 on it need a fix because i am tired of having to delete the OS and re install it every time plus the key Microsoft gave me for windows 7 pro does nto work and i do not have another one also it has 2 GB of ram and i do not want to have it not be able to run windows 7 after i spent all this money just trying to get it upgraded to work for windows 7 perfectly cant support windows 8 because its an inlet Pentenuim 4 2.2 GHz and does not have the part required for it also the virtual machine i have on my laptop that has about 2 gb of ram works fine and its a 64-bit of windows 7 pro

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  2. Anonymous
    2013-10-10T11:01:59+00:00

    After doing that I got "Access is denied". What does it mean ?

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  3. Anonymous
    2012-10-15T18:37:18+00:00

    Hi, i have a problem with booting up my Win7. Today i have experienced a system crash and after that my Windows cannot boot the proper way. If i go through F8 option on startup i can choose my system disk directly and thats the only way i get into windows. Everything works fine, system does not report anything unusual and seems to be running normally. Only problem is that it cannot boot up automatically, i have to allways go through F8 and select my system disk. After a google search i found this thread. Can anyone help me? I have all ready read through all those posts here and tryed all i could. So far my last option is system reinstall, whitch i would hate to do.

    Thanks in advance.

    BTW: Memory, CPU and GPU is fine, i've checked that. I don´t think system disk is damaged when it can load after being selected manually

    Solved! Don't ask how, because i feel like a fool...

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  4. Anonymous
    2012-10-15T15:12:27+00:00

    Hi, i have a problem with booting up my Win7. Today i have experienced a system crash and after that my Windows cannot boot the proper way. If i go through F8 option on startup i can choose my system disk directly and thats the only way i get into windows. Everything works fine, system does not report anything unusual and seems to be running normally. Only problem is that it cannot boot up automatically, i have to allways go through F8 and select my system disk. After a google search i found this thread. Can anyone help me? I have all ready read through all those posts here and tryed all i could. So far my last option is system reinstall, whitch i would hate to do.

    Thanks in advance.

    BTW: Memory, CPU and GPU is fine, i've checked that. I don´t think system disk is damaged when it can load after being selected manually

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    0 comments