win8.1 x64; ERROR_SXS_COMPONENT_STORE_CORRUPT; Failed to get CSI system store; OpenCanonicalDataKey

One or more of these may be useful:

1) system restore to a date prior to the corruption

2) restore an image that was created prior to the corruption

3) perform regback

4) perform an in place upgrade repair (often does not fix registry problems)

5) perform a custom install

6) upgrade / clean install to Windows 10

Options 1 -4 do not require the reinstallation of drivers or applications.

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Let's see if this is a possible fix.

1) boot to the Windows MCT

2) it may take 5 minutes displaying the windows icon

3) Use the default settings for language, time, currency, and keyboard

4) click next

5) In the left lower corner click Repair your computer

6) click troubleshooting

7) click startup repair (it is expected to fail)

8) click system restore (it is expected to fail)

9) click command prompt

You should see a pop up with title bar: Administrator: X:\windows\system32\cmd.exe

This is the registry backup method:

For each step you must see sizable file sizes for this to work.

If you see zeros the method will fail.

The command: dir

will be used for each step to make sure you are in the proper location and check the size of the files

10) type: C:
11) dir

12) type: D:
13) dir

Choose the C: or the D: drive to proceed. It should be the windows drive and not the USB drive.

14) type: bcdedit | find "osdevice"

This should display the location of the partition and in most cases is the location of the affected drive.

For this post I will use C: however you should pick the drive letter that you found that has the windows files on your computer.

The proper drive will display: perflogs, program files, program files (x86), users, windows, etc

15) type or copy and paste: cd \windows\system32\config

It should display: C:\windows\system32\config>

16) type: dir

It should display: bbi, bcd-template, components, default, drivers, elam, sam, security, software, system, vsmidk, journal, regback, systemprofile txr, etc.

All of the file sizes should be sizable. If it displays zeros then abort.

Make a new directory and name it backup or something similar.

17) type: MD backup

Copy all of the files into this new directory.

18) type or copy and paste: copy . backup

It should now display: bbi, bcd-template, components, default, drivers, elam, sam, security, software, system, vsmidk indicating the files were copied.

Change the directory to regback

19) type: cd regback

It should now display: c:\windows\system32\config\regback>

20)type: dir

It should display: default, sam, security, software, system etc

All of these files must be sizable. If it displays zeros then abort.

21) type or copy and paste: copy . ..

It should now display:

DEFAULT

Overwrite ..\default? (yes/no/all):

22) type: a

It should now display: sam, security, software, system and that the files were copied.

23) type: exit

24) click turn off your PC

Remove the USB flash drive if you had changed your boot order. Otherwise you can leave it and power on your computer.

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I'd just notice a website problem where it omitted part of the commands.

Any command with a * it failed to display the *

There could be other website issues so compare each post for the applicable command.

This is another post.

Let's see if this is a possible fix.

1) boot to the Windows 10 iso
2) it may take 5 minutes displaying the windows icon
3) Use the default settings for language, time, currency, and keyboard
4) click next
5) In the left lower corner click Repair your computer
6) click troubleshooting
7) click startup repair (it is expected to fail)
8) click system restore (it is expected to fail)
9) click command prompt
You should see a pop up with title bar: Administrator: X:\windows\system32\cmd.exe
This is the registry backup method:
For each step you must see sizable file sizes for this to work.
If you see zeros the method will fail.
The command: dir 
will be used each step to make sure you are in the proper location and check the size of the files
10) type: C:
11) dir
12) type: D:
13) dir
Choose the C: or the D: drive to proceed. It should be the windows drive and not the USB drive.
14) type: bcdedit | find "osdevice"
This should display the location of the partition and in most cases is the location of the affected drive.
For this post I will use C: however you should pick the drive letter that you found that has the windows files on your computer.
The proper drive will display: perflogs, program files, program files (x86), users, windows, etc
15) type or copy and paste: cd \windows\system32\config
It should display: C:\windows\system32\config>
16) type: dir
It should display: bbi, bcd-template, components, default, drivers, elam, sam, security, software, system, vsmidk, journal, regback, systemprofile txr, etc.
All of the file sizes should be sizable. If it displays zeros then abort.
Make a new directory and name it backup or something similar.
17) type: MD backup
Copy all of the files into this new directory.
18) type or copy and paste: copy *.* backup
It should now display: bbi, bcd-template, components, default, drivers, elam, sam, security, software, system, vsmidk indicating the files were copied.
Change the directory to regback
19) type: cd regback
It should now display: c:\windows\system32\config\regback>
20)type: dir
It should display: default, sam, security, software, system etc
All of these files must be sizable. If it displays zeros then abort.
21) type or copy and paste: copy *.* ..
It should now display: 
DEFAULT
Overwrite ..\default? (yes/no/all):
22) type: a
It should now display: sam, security, software, system and that the files were copied.
23) type: exit
24) click turn off your PC
Remove the USB flash drive if you had changed your boot order. Otherwise you can leave it and power on your computer.

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The regback unfortunately will fail then by the dates.

A custom install will save files to Windows.old

Drivers and applications need to be reinstalled.

Important files are copied from Windows.old

These are links for Windows 10 which can be applied to Windows 8.1:

https://www.tenforums.com/tutorials/120352-custom-install-windows-10-a.html

https://www.tenforums.com/tutorials/148005-how-restore-files-windows-old-folder-windows-10-a.html

There are third party software (for a fee) that may have options.

See if Laplink has any options:

https://go.laplink.com/pcmover-branded/transfer-programs-to-new-computer?utm_source=google&utm_medium=ppc

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OK, I solved it with regedit.
First, what is SXS COMPONENT STORE. I think it refers to \WINDOWS\SYSTEM32\CONFIG\COMPONENTS, it is a registry which will load into HKLM or HKEY_LOCAL_MACHINE.
The ERROR_SXS_COMPONENT_STORE_CORRUPT is thrown when HKLM\COMPONENTS is missing some keys for example HKLM\COMPONENTS\DerivedData.
So it's easy to solve:

1. if HKLM\COMPONENTS is corrupt, execute REG UNLOAD HKLM\COMPONENTS, then delete COMPONENTS file and execute REG LOAD HKLM\COMPONENTS C:\WINDOWS\SYSTEM32\CONFIG\COMPONENTS
2. import following .reg file
   Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\COMPONENTS]
"StoreFormatVersion"=hex:30,00,2e,00,30,00,2e,00,30,00,2e,00,36,00

[HKEY_LOCAL_MACHINE\COMPONENTS\CanonicalData]

[HKEY_LOCAL_MACHINE\COMPONENTS\CanonicalData\Catalogs]

[HKEY_LOCAL_MACHINE\COMPONENTS\CanonicalData\Deployments]

[HKEY_LOCAL_MACHINE\COMPONENTS\ccpinterface]

[HKEY_LOCAL_MACHINE\COMPONENTS\DerivedData]

[HKEY_LOCAL_MACHINE\COMPONENTS\DerivedData\Components]

[HKEY_LOCAL_MACHINE\COMPONENTS\DerivedData\VersionedIndex]

[HKEY_LOCAL_MACHINE\COMPONENTS\Installers]

[HKEY_LOCAL_MACHINE\COMPONENTS\ServicingStackVersions]

3. execute DISM /Online /Cleanup-Image /RestoreHealth

Now it's better, at least CSUR says it's ok.
And now it's time to solve problems like "MissingWinningComponentKey on resource [92]"amd64_netfx4-fod_advertised_shared_reg_b03f5f7f11d50a3a_4.0.9680.16462_none_f7c58d76dde901b6"[gle=0x80004005]". And I think that's because some values are missing in HKLM\COMPONENTS\DerivedData\Components\<Component Name>\