For solution 1, UEFI boot has to be disable otherwise you will probably encounter this error :
The boot configuration store could not be opened
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I installed the update KB2919394 and my computer was thrown into the dreaded automatic repair loop, which Microsoft hasn't fixed yet.
Anyways I thought I would give some solutions on how to get out of this. Solution 1 is what worked for me.
Solution 1
This solution is to disable the automatic repair from starting if your computer fails to boot into windows.
What you will need - A Windows 8 or 8.1 CD
Step 1: Place the CD in your drive and proceed to boot from it
Step 2: When the install screen pops up, look to the bottom left and select "Repair Your Computer".
Step 3: You will now see a screen that says "Choose an option". Select "Troubleshoot", then "Advanced Options", and finally "Command Prompt".
Step 4: You should now see the command prompt. Type "bcdedit" (without quotes) and hit enter.
Step 5: A list should have appeared. Towards the top, you should see "resumeobject" (It is under "default"). Highlight the long number, including the brackets, and copy.
Step 6: Now type "bcdedit /set (the long number you copied) recoveryenabled No" (Without quotes). Hit enter.
Step 7: You should now see the message "The operation completed successfully"
Step 8: Type "Exit" (Without quotes)
Step 9: Reboot
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Solution 2
Booting into safe mode first, then rebooting the computer.
What you will need - nothing
So you are at the screen that says something on the lines of "Windows did not load properly".
Step 1: Select "Advanced repair options"
Step 2: Select "Troubleshoot"
Step 3: Select "Advanced Options"
Step 4: Select "Start up settings"
Step 5: Select "Restart"
Step 6: The computer should restart. Now you want to hit the 4 key, which is safe mode.
Step 7: You should be able to log in now. Restart the computer and the computer should boot normally.
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Solution 3
Running check disk to see if your hard drive is the problem
What you will need - A Windows 8 or 8.1 CD
Step 1: Place the CD in your drive and proceed to boot from it
Step 2: When the install screen pops up, look to the bottom left and select "Repair Your Computer".
Step 3: You will now see a screen that says "Choose an option". Select "Troubleshoot", then "Advanced Options", and finally "Command Prompt".
Step 4: Type "chkdsk /r C:" (Without quotes)
Step 5: The scan should start. This could take several hours depending on the size of your hard drive.
Step 6: Once the scan is done, type "exit" (without quotes).
Step 7: Reboot
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Solution 4 (Found out by user DayDay13)
Making sure your hard drive is first in boot priority.
What you will need - nothing
Step 1: Boot into BIOS on your computer
Step 2: Go into your boot priority list
Step 3: If you see "Windows Boot Manager" as number 1 in your priority, change it so that your hard drive is number 1.
Step 4: Save and exit BIOS
Step 5: Reboot
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Microsoft community, please do not delete this thread. These are confirmed solutions that have worked for many others with the automatic repair loop problem. I will add more if any other solutions become available.
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
For solution 1, UEFI boot has to be disable otherwise you will probably encounter this error :
The boot configuration store could not be opened
Worse!
I have three drives all with Win 8.1 and all work
fine in my desktop but only one will work without
trouble in the laptop.
Not yet found a solution.
Most odd.
Makes no sense.
Double that...this is the only way I was able to break the loop. But I also ran into other problems after the loop break.
The solution 3 worked for me.
My problem was that after enter the bitlocker key, Windows was starting the autorepair asking for the bitlocker recovery key, which I haven't, so the computer was in a autorepair loop.
I was about to format the disk when I found this post.
Thank a lot!!!!!
PD: Sorry by my english!!!
Hold down the F12 button on the Toshiba while trying to boot the machine up. It will take you into a screen that lets you change the BIOS.