Corrupt Registry: Root Cause in Startup Repair.

After clicking safe mode command prompt, im taken to the startup repairand runs again to give me the same errors.  Ive already posted my issue iwth the errors i am getting. I ask here since your explanations are clearer to me than most and hoping you can run by my post and perhaps suggest something. 

Thanks!!

Your extra info worked pretty fine to me, thank you very much, I was so afraid of loosing all my info.

I had the problem of not being able to "copy /y software  ..", Tte system couldn't find the files when following the exact steps from the first reply, but following your extra steps it worked perfectly when I did the "after this section continue with the copy commands give by the author." and restarted

My problem was on a Lenovo Thinkpad E430 laptop, windows 7 ulti 64 bits, 4Gb RAM.

Some days ago first something seems to smell bad when multiple blue screens started to pop up when opening certain softwares.

Finally the restart loop appears, and the Problem had this description:

Signature 01: 6.1.7600.16385

Signature 02: // (equal above)

Signature 03: Unknown

Signature 04: -1

Signature 05: Auto failover

Signature 06: 20

Signature 07: Corrupt registry

Last days I made some registry clean ups with ccleaner for fixing BlueStacks and Avira problems, maybe I messed up something doing that.

Thanks you so much!

Since the first part to login with Safe Mode to Command Prompt did not success, I read carefully all steps to understand that you can manually replace the defected registry with last known good settings, which was backed up by windows OS.

What you actually need to do is to replace 3 files from Q:\windows\System32\config\RegBack.

So I have another PC which is working good, I plugged the hard disk with the corrupted registry and replace these registry files easily from my computer (you must be a administrator on the healthy PC to get access to any folder).

So after you access the disk you need to:

1. Backup all your registry folder C:\windows\System32\config to new location as Q:\RegBack\ (If this solution don't work you could reverse these actions)
2. Return to C:\windows\System32\config\ and look for RegBack folder
3. From Q:\windows\System32\config\RegBack select 3 files named: software; System; Sam
4. Copy these 3 files to Q:\windows\System32\config\

Now you can shutdown all PCs and return the hard disk to it's original PC.

Windows recovery now should found a solution and suggest to attempt system restore (which may take a while).

This work good for me! Good luck for you to

I am afraid that the Author has not included other fixes and keeps cutting and pasting the same info again and again to the following pages.

On my Acer window 7 32 bit ultimate computer on 14/09/2015 I had a very similar problem

with a corrupt registry and the hard disk would not start up or windows would not start the system kept going into the system repair screen, if you are quick you can turn this repair screen off by clicking on cancel several times over and then move onto opening a command prompt.

I kept reading online that registry cleaners seem to do this damage so I have unticked the Reg cleaner box in all programs after my fix that scan my system in future.

If you follow this you should be ok and get your pc running again hopefully.

Run the system repair programme and close the repair utility then move to the section where you can open a command prompt at the bottom of the list.

After you follow the given instructions to find the windows folder and you know which folder that is, Mine was C:

 lets continue to use the letter Q as the Drive letter yours may be a different letter.

Type this command as directed.

cd /d Q:\windows\system32\config and then press return.

Then type this observing all the spaces as above.

xcopy *.* Q:\regback\  then press the return button.

then type

cd regback  and press return button

then type

dir        and press return button

now following the instructions in section 8 observe the SAM files and see the  date is before the problem occurred or afterwards if it is before continue with the instructions as given. if it does not work do not worry there is another step that has been missed. it is not obvious as many may reach the end of the problem at this stage but many may not so here we go.

type in the first four commands above, on seperate lines hitting the return button each time the final one is 

dir then press return

this time you should see a dialogue pop up that says something similar to delete all

files in this section and in brackets ( yes/no/all )

there will be a number of questions like this 12 in all you will need to answer them  by typing a for all.

after this section continue with the copy commands give by the author.

restart the computer don't worry if it doesn't work there is another option yet, that might get your computer running.

and this one fixed mine.

as the computer starts up it should give you the option to enter the set up Utility by either pushing delete or F8 usually delete is the one tap it twice every second as the computer starts up.  some laptops require that you tap F2 it might be advisable to Google this question for your particular laptop: "Access setup screen on your computer name here". on a working computer phone etc.

Once the setup utility screen appears it can be white writing on a blue screen or yellow writing on a blue screen, you will only be able to navigate these screens with the keyboard from here on in. mouse control will come back with windows so don't worry.

Now move the direction arrows on your keyboard either to the right to select from a top menu or down one push at a time to highlight "integrated peripherals"

and press the return button.

use the red curser and the arrow buttons to select SATA Operation Mode.

it could be that the default setting is Sata and on some computers, if this section is set

to ide. registry errors can restore the original settings to SATA Mode which stops the

Hard disk from being booted up. This may certainly be the case for older computers which may have older motherboards 5 years or more. particularly 32 bit systems.

once you have highlighted sata operation mode press return and if it is set to sata mode  select "IDE" instead

in the drop down box.  press return to save this then press escape or ESC button to return to the previous screen.

press the right direction button to highlight save and exit setup press return select Y for yes and press return again.

hopefully your computer will start up on its own.

I'd love to know of anyone has had any success with this beyond the original authors posting.  I hope it works for you.

it has taught me to always back up those important files just in case.

That sinking feeling is not very nice at all. but I am pleased to be able to share a positive experience with you and it would not have been possible without the help of the original author in what was typed up on this website.

Good Luck.