What Can We Still Try After “Startup Repair Cannot Repair This Computer Automatically” Error?

Sometimes the startup repair won’t able to repair your computer’s windows and showing you the “Startup Repair Cannot Repair This Computer Automatically” error with the description like this:

Problem Event Name: StartupRepairOffline
Problem Signature 01: 6.1.7600.16385
Problem Signature 02: 6.1.7600.16385
Problem Signature 03: unknown
Problem Signature 04: 21200400
Problem Signature 05: AutoFailover
Problem Signature 06: 13
Problem Signature 07: CorruptFile
OS Version: 6.1.7600.
Locale ID: 1033

That’s not compulsory the startup repair will definitely fix your problem because most of the time your windows got corrupted in really bad condition and that’s why it forgot its own boot volume.

The second reason which also could be possible is, your startup repair can’t able to repair those files which need to be replaced because of some minor fault in your previously installed windows.

So, both reasons can be possible and the bad part about this error is we can’t able to identify why this problem is occurring in your PC by which one of these reasons.

That’s why you‘ll need to troubleshoot it step by step to find and fix the real problem and I’m gonna help you out to fix this problem by your own.

Solution 1# – Fixing Inactive HDD Partition

An active partition is a partition in your computer’s hard disk which known as bootable partition who contain your PC’s operating system. Normally only one partition can be active at the time like c: drive where mainly our windows is installed.

Sometimes that partition got inactive due to some reasons and we’ll need to reactive it in order to show it on recovery options.

First open cmd on your computer’s screen by pressing the Shift + F10 Key and then type the command what I’m listed below:

Command #1 – diskpart

This command will start disk part utility in your command prompt. When diskpart will start you’ll able to see “DISKPART>” on the left side.

Command #2 – list disk

This will list all of your connected drives in your computer.

Command #3 – select disk 0

In this step, we’re selecting our main hard drive where your window is installed. In my case, I’m selecting disk 0 because that’s the only drive shown in my cmd and that’s the also one where my OS is installed.

Command #4 – list partition

This command will show you all the partitions created in that disk what you’ve selected.

Command #5 – select partition 1

Normally we are selecting partition 1 because that’s our Windows Boot Partition, but that also doesn’t prove that we will always need to select the 1st one because sometimes partition 2 can be our Boot Partition too. So, make sure you select the partition where your Boot files are located and not the windows.

Note: Only select those drives whose capacity is same as these “100 MB”, “350MB” And “500MB”.

Command #6 – active

That will make your partition active.

Command #7 – exit

Now restart your computer and open the system recovery options again to see the changes in it.

Solution 2# – Fixing Windows Master Boot Recode

The MBR or I say master boot recode is the most important data structure on the disk which is mainly created when we make a partition in our hard disk to install windows.

It’s possible your boot volume got corrupted by some recently installed Software, Viruses or Windows/Software updates and it’s better to get it repair as soon as possible So, now we are using cmd command to repair our hard disk boot volume and now you’ll just need a cmd to type the command into the command prompt.

Command 1# – Diskpart

Command 2# – List volume

Command 3# – Exit

You’ll need to find your windows drive letter in that list, like mine is 29 GB D: drive.

Now you know what is your drive letter is, so just enter your drive letter in the command prompt and repeat the following command given below.

Command 4# – D:  (Your Windows Drive Letter)  

Command 5# – Bootrec /fixmbr

Command 6# – Bootrec /fixboot

Command 7# – Bootrec /rebuildbcd  {Skip this command only for the first time and use it if skipping this won’t works after testing but definitely use the chkdsk command written below in every try.}

Command 8# – Chkdsk  /f    (Try chkdsk /f /r If “Chkdsk /f” command Won’t Works)

Command 9# – Y

After “chkdsk” command completes, just restart your computer and I hope your problem is solved.

Solution 3# – Fixing Windows Files Manually

First open cmd on your computer’s screen by pressing the Shift + F10 Key and then type the command what I’m listed below and follow the other instructions too:

When you opened your command prompt it will show you the path “X:\windows\system32>” by default because of your setup using an internal ram disk to open itself.

But now we’ll need to change the cmd path because we do want to edit our previously installed windows to fixing it and that’s why the next thing what we’re doing is trying to find our previous installed windows drive.

Command 1# – c:

This command will change’s your cmd path to the C:\ Drive and then you can easily check that’s my windows driver or not by using the second command which is:

Command 2# – dir

After dir command if your cmd shows you some directory listed in it, which showing you Program Files, Users, and Windows folders, if you’ve did found your system drive perfectly and “C:/ Drive” is your windows drive and you can skip the next couple paragraphs where are written about changing drives path to the second partition.

If your cmd shows you “volume in drive c is system reserved” just like the picture given below then it’s not your windows driver and now you’ll need to use the “d:” in your next command to open the D Driver in the command prompt and just like the above one use the “dir” command again to confirm that does “D:\ Driver” is the one who’s having my windows installed in it or not.

Mine one is d:\ and If you still won’t getting the directory in your D Drive also, then now change your drive letter to E, F or some other letter until you’ve found where the system drive is located.

Now type your windows config folders path into the cmd to open it and after that use the dir command again to find which files and folders are stored in it.

Command 3# – cd\windows\system32\config

Command 4# – dir

After using the dir command if your command prompt shows you some files and folder who’s having these names  exist in that config folder, then everything is great just move to the next command.

  • RegBack (which is a folder)
  • SAM

Now you’ll have to make a backup of all some files and restore it into the another folder to fix your windows important boot files which help your window to start properly

So, use these command

Command 5#MD mybackup

Command 6#copy *.* mybackup

If it asks you to overwrite existing files, just type A and press enter to allow all backups to be overwritten.

Now let’s check if we can use the automatic Windows backups to restore your corrupted registry:

Command 7# – CD RegBack

Command 8# – DIR

After the above one commands now you’ll need to check does that directory what you’ve opened is having these files stored in it with the file name.

I want you to check the file or folder size also.

  • The DEFAULT, SAM and SECURITY files must be about 262,000 bytes in their size.
  • The SOFTWARE file should be about 26,000,000 bytes.
  • The SYSTEM file should be about 9,900,000 bytes.

The file sizes what I existing here are estimated, and its possible it may differ by the condition of your system. If anyone of them shows you 0 bytes, then you have to stop what you’re doing and try to use some other alternative method to fixing your windows, because an operating system cannot work with 0-byte size registry hive.

If everything looks good then use the remaining commands mentioned below.

Command 9# – copy *.* ..

If it asks you to overwrite existing files, just type A and press enter to allow all backups to be overwritten.

Command 10# – exit

Now restart your computer and test it, if the problem still stays then try to use the startup repair thing one more time.


Click Here To See >> How To Install Windows?


  1. I used to solution 1, however after I restart my comp, it can out BOOTMGR is missing. and the loop start over and over agn, can you help me pls!!

  2. When I use Command #3 and #4 in Solution #3, a window(?) called “cmd.exe – Corrupt File” pops up. It says “Exception Processing Message 0xc0000 102 Parameters 0x7571EC 0x757157CE 0x7571EC 0x757157CE”. Is there a way to fix this? I’m trying to find a way out of a Startup Repair loop. Thank you.

  3. When I did command #3, I typed in ‘cd\windows\system32\config’ but when I pressed enter it told me “The system cannot find the path specified.”

  4. I tried solution #1 and like one other commenter stated, it then said missing BOOTMGR. But then after it kept restarting, it shut down and now won’t even start up anymore (which it never did before). Now I can’t even get back to my cmd to try other solutions since the computer is now dead and won’t turn back on. So obviously solution #1 has this effect on some computers and is dangerous to even attempt.

    • Now try to use startup repair with your Windows USB or Disc, and that will work for you.
      Use this link if you don’t know about, how to do that?

  5. Solution 3# – Fixing Windows Files Manually worked for me , Thank you so much for such a precise and detailed solution. you are bookmarked for ever on my PC

  6. hello, thanks very much for your article having a problem with my window 10, Bootmgr is missing so I tried your instructions no luck tried manual repair and realize that files on Sam, Security, Software, System are 0 what does it means thank you

  7. I will try startup repair with a bootable Windows USB, but the point is that using your solution #1 is what caused a worse issue with the missing BOOTMRG file and I followed it exactly step by step. I looked up that missing BOOTMGR issue and came to multiple websites stating that when changing the partition to active drive C will cause the BOOTMGR file to go missing and then giving ways to fix that. So the solution #1 you gave will likely cause the BOOTMGR file to go missing, thus causing another issue to fix for those who attempt it. You should edit this post and at least state this could happen in the solution #1 and the reason why it could happen so people know before they attempt it.

  8. I did solution #3 everything work besides when I go and log in with my password I get Can’t sing into account
    if I dismiss it I get critical error

  9. I have blue screen STOp: c000021a {fatal system error} The initial session process or system process terminated unexpectedly with a status of 0x0000000000 (0xc0000001 0x00090448)

  10. Problem Event Name: StartupRepairV2
    Problem Signature 01: externalmedia
    Problem Signature 02: 6.0.6000.16386.
    Problem Signature 03: 0
    Problem Signature 04: 65537
    Problem Signature 05: unknown
    Problem Signature 06: missing boot mgr
    Problem Signature 07: 0
    Problem Signature 08: 2
    Problem Signature 09:wrprepair
    Problem Signature 10:21 OS Version: 6.0.6000.
    Locale ID: 1033

    What’s the solution for this problem???? Please help me

  11. My computer was showing low disk running space. I deleted some files for more space from C: and when I restart my computer than after “starting windows” option computer restarts everytime. What should I do? I don’t want to install new windows.

  12. Hi I have tried all 3 of the options and all of the cmd all seem ok when I type them in but when I restart after each of the options the startup repair comes back again and windows still does not boot. Please help thanks

  13. I just had to deal with this. After restoring an older registry (didn’t help), confirming the partition was active (didn’t help), I finally got a specific message – one of the drivers was not getting its digital signature verified. My client had installed a security program that his bank had given him. Since I couldn’t boot into Window (7) at all, even command prompt, and using the install disk “repair” option didn’t help, I booted in with a Hiren’s Repair CD. Then I used System Startups (comes with Hiren’s), used the “offline computer” option, and disabled every instance of this program running at startup. There were about five separate things it did at startup, some of which didn’t appear in the “all” section – I had to go through each tab of System Startups to uncheck all of them.
    However, upon a reboot the system came up normally! Saved me the time and trouble of backing up all of his stuff and reinstalling Windows, not to mention the hassle of reinstalling all his programs.
    Hopefully, this will help someone else.

  14. I used “Solution 3# – Fixing Windows Files Manually”.
    This did not work for me.
    In the command “Command 8# – DIR”, i found that the DEFAULT, SAM and SECURITY files must be about 762,000 bytes, 25,375 bytes, 30, 380 bytes in their size.

    How can i make each one equal to about 262,000 bytes in their size ?
    Pl. explain this.

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