Error with Windows Update KC5126657

Question

Error with Windows Update KC5126657

A N 20

I have been trying to install Windows 10 Update KB5126657, however, I get error 0x80070005 whenever I try to install. From the Windows Update log:

2026/10/21 12:14:47.6953703 19848 23044 UDP Deployment job Id A028E7A7-35EE-4B55-89E2-7CA32B35E987 : Method failed for update D125362D-3C64-4321-BD85-5BBA34BB6DBF.200, hrDeploy = 0x8024200b, error code = 0x80070005, error description = (null)

Things I have tried:

Temporarily uninstalling Anti-virus
Running icacls C:\Windows\WinSxS /reset /t /c /q in Administrator Command Prompt (Access Denied)
Restarting BITS and Windows Update Services
Running ren C:\Windows\System32\catroot2 catroot2.old in Administrator Command Prompt (Access Denied)
Running sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth in Administrator Command Prompt (No issues found How do I fix this?

0 comments

Answer accepted by question author

Ramesh 183.5K Volunteer Moderator

Resetting WinSxS permissions is not a good idea.

Please try the offline installer (MSU) package.

https://catalog.s.download.windowsupdate.com/c/msdownload/update/software/secu/2026/10/windows10.0-kb5126657-x64_6ea46ad975176d6c6e9dcc79859d67c5193d6fc0.msu

If the update still fails, upload your CBS logs to OneDrive or GoFile.io and post the link here.

The logs are available in the following folder. Copy the following folder to the desktop.

c:\windows\logs\cbs

Zip the folder and share the file on OneDrive or GoFile.io. Post the link here.

A N 20 Reputation points

2026-10-22T16:39:34.8666667+00:00

https://gofile.io/d/jEOlA94f
Ramesh 183.5K Reputation points Volunteer Moderator

2026-10-22T16:45:14.52+00:00
Please open Command Prompt admin and run these commands:

icacls C:\Windows\SystemTemp icacls "%temp%" icacls C:\Windows\Temp

Post the output.

A N 20

C:\WINDOWS\system32>icacls C:\Windows\SystemTemp

C:\Windows\SystemTemp NT AUTHORITY\SYSTEM:(OI)(CI)(F)

                  BUILTIN\Administrators:(OI)(CI)(F)
```Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls "%temp%"

C:\Users\Anthony\AppData\Local\Temp NT AUTHORITY\SYSTEM:(I)(OI)(CI)(F)

```ruby
                                BUILTIN\Administrators:(I)(OI)(CI)(F)

                                RASPUTIN\Anthony:(I)(OI)(CI)(F)

                                RASPUTIN\Administrator:(I)(OI)(CI)(F)
```Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls C:\Windows\Temp

C:\Windows\Temp RASPUTIN\Anthony:(OI)(CI)(D,RD,X)

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>

Ramesh 183.5K Volunteer Moderator

The C:\Windows\Temp permissions are incorrect.

Run these commands:

takeown /f c:\windows\temp
icacls c:\windows\temp /reset
icacls c:\windows\temp /inheritance:r
icacls c:\windows\temp /grant Administrators:(OI)(CI)(F)
icacls c:\windows\temp /grant SYSTEM:(OI)(CI)(F)
icacls c:\windows\temp /grant "%username%":(OI)(CI)(F)
icacls c:\windows\temp

Post the screenshot of the output window.

A N 20 Reputation points

2026-10-22T17:32:49.4533333+00:00
C:\WINDOWS\system32>takeown /f c:\windows\temp

SUCCESS: The file (or folder): "c:\windows\temp" now owned by user "RASPUTIN\Anthony".

C:\WINDOWS\system32>icacls c:\windows\temp /reset

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /inheritance:r

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /grant Administrators:(OI)(CI)(F)

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /grant SYSTEM:(OI)(CI)(F)

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /grant "%username%":(OI)(CI)(F)

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp

c:\windows\temp RASPUTIN\Anthony:(OI)(CI)(F)

NT AUTHORITY\SYSTEM:(OI)(CI)(F) BUILTIN\Administrators:(OI)(CI)(F)

Successfully processed 1 files; Failed processing 0 files
Ramesh 183.5K Reputation points Volunteer Moderator

2026-10-22T17:35:35.38+00:00
Please run the Disk Cleanup tool to clear the Temp files.

Press Win + R, type cleanmgr.exe and click OK.

Select the drive (C:), and click OK.

Click the Cleanup system files button.

Select the drive (C:), and click OK.

Select all of the following checkboxes:

Microsoft Defender anti-virus Windows upgrade log files Temporary Internet files System-created Windows Error Reporting files DirectX Shader Cache Delivery Optimization files Device driver packages Previous Windows installations Recycle Bin Temporary files Temporary Windows installation files Thumbnails

Click OK.

Click Delete Files.

Restart Windows and install the latest cumulative update.
Ramesh 183.5K Reputation points Volunteer Moderator

2026-10-22T17:54:38.2233333+00:00

Note: Please check that the system TEMP isn't redirected elsewhere. It should point to C:\Windows\Temp. You can verify that by running C:\Windows\system32\SystemPropertiesAdvanced.exe

Click Environment Variables.

Under System variables, check TEMP and TEMP values.

1 additional answer

Your answer

A N 20 Reputation points

2026-10-22T16:39:34.8666667+00:00

https://gofile.io/d/jEOlA94f
Ramesh 183.5K Reputation points Volunteer Moderator

2026-10-22T16:45:14.52+00:00

Please open Command Prompt admin and run these commands:

icacls C:\Windows\SystemTemp icacls "%temp%" icacls C:\Windows\Temp

Post the output.
A N 20 Reputation points

2026-10-22T17:22:09.5866667+00:00

C:\WINDOWS\system32>icacls C:\Windows\SystemTemp

C:\Windows\SystemTemp NT AUTHORITY\SYSTEM:(OI)(CI)(F)

BUILTIN\Administrators:(OI)(CI)(F) ```Successfully processed 1 files; Failed processing 0 files C:\WINDOWS\system32>icacls "%temp%" C:\Users\Anthony\AppData\Local\Temp NT AUTHORITY\SYSTEM:(I)(OI)(CI)(F) ```ruby BUILTIN\Administrators:(I)(OI)(CI)(F) RASPUTIN\Anthony:(I)(OI)(CI)(F) RASPUTIN\Administrator:(I)(OI)(CI)(F) ```Successfully processed 1 files; Failed processing 0 files C:\WINDOWS\system32>icacls C:\Windows\Temp C:\Windows\Temp RASPUTIN\Anthony:(OI)(CI)(D,RD,X) Successfully processed 1 files; Failed processing 0 files C:\WINDOWS\system32>
Ramesh 183.5K Reputation points Volunteer Moderator

2026-10-22T17:27:14.7733333+00:00

The C:\Windows\Temp permissions are incorrect.

Run these commands:

takeown /f c:\windows\temp icacls c:\windows\temp /reset icacls c:\windows\temp /inheritance:r icacls c:\windows\temp /grant Administrators:(OI)(CI)(F) icacls c:\windows\temp /grant SYSTEM:(OI)(CI)(F) icacls c:\windows\temp /grant "%username%":(OI)(CI)(F) icacls c:\windows\temp

Post the screenshot of the output window.
A N 20 Reputation points

2026-10-22T17:32:49.4533333+00:00

C:\WINDOWS\system32>takeown /f c:\windows\temp

SUCCESS: The file (or folder): "c:\windows\temp" now owned by user "RASPUTIN\Anthony".

C:\WINDOWS\system32>icacls c:\windows\temp /reset

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /inheritance:r

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /grant Administrators:(OI)(CI)(F)

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /grant SYSTEM:(OI)(CI)(F)

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp /grant "%username%":(OI)(CI)(F)

processed file: c:\windows\temp

Successfully processed 1 files; Failed processing 0 files

C:\WINDOWS\system32>icacls c:\windows\temp

c:\windows\temp RASPUTIN\Anthony:(OI)(CI)(F)

NT AUTHORITY\SYSTEM:(OI)(CI)(F) BUILTIN\Administrators:(OI)(CI)(F)

Successfully processed 1 files; Failed processing 0 files
Ramesh 183.5K Reputation points Volunteer Moderator

2026-10-22T17:35:35.38+00:00

Please run the Disk Cleanup tool to clear the Temp files.

Press Win + R, type cleanmgr.exe and click OK.

Select the drive (C:), and click OK.

Click the Cleanup system files button.

Select the drive (C:), and click OK.

Select all of the following checkboxes:

Microsoft Defender anti-virus Windows upgrade log files Temporary Internet files System-created Windows Error Reporting files DirectX Shader Cache Delivery Optimization files Device driver packages Previous Windows installations Recycle Bin Temporary files Temporary Windows installation files Thumbnails

Click OK.

Click Delete Files.

Restart Windows and install the latest cumulative update.
Ramesh 183.5K Reputation points Volunteer Moderator

2026-10-22T17:54:38.2233333+00:00

Note: Please check that the system TEMP isn't redirected elsewhere. It should point to C:\Windows\Temp. You can verify that by running C:\Windows\system32\SystemPropertiesAdvanced.exe

Click Environment Variables.

Under System variables, check TEMP and TEMP values.

Answer 1

Back up important files, restore WinSxS ownership to TrustedInstaller, reset its permissions, and then reset the Windows Update folders while all three relevant services are stopped.

1. Repair ownership and permissions

The 0x80070005 result is E_ACCESSDENIED; Microsoft associates it with Windows Update being unable to access required files, folders, or registry entries. The accompanying 0x8024200B only indicates that the update installer failed—it does not identify a more specific cause.^1^^2^

Because resetting WinSxS permissions already returned Access Denied, first restore its documented owner:

Back up important personal files.
Search for Command Prompt, right-click it, and select Run as administrator.
Run these commands individually:

icacls "%windir%\WinSxS" /setowner "NT SERVICE\TrustedInstaller" /t /c /q
icacls "%windir%\WinSxS" /reset /t /c /q
icacls "%windir%\SoftwareDistribution" /reset /t /c /q

Some individual access-denied messages can be reported while /c continues processing. If the commands complete, restart Windows and try the update once. These are Microsoft’s documented ownership and permission repairs for this error.^1^

2. Reset all Windows Update components

If the update still fails, use the complete reset sequence below. You previously stopped BITS and Windows Update, but stopping Cryptographic Services as well may release the catroot2 folder. An access-denied result can also come from permissions or file-system filter drivers, so this is not proof that Cryptographic Services caused the earlier failure.

Run in an administrative Command Prompt:

net stop wuauserv
net stop bits
net stop cryptSvc

ren "%windir%\SoftwareDistribution" SoftwareDistribution.old
ren "%windir%\System32\catroot2" catroot2.old

net start cryptSvc
net start bits
net start wuauserv

Restart the PC, then open Settings → Update & Security → Windows Update → Check for updates. Windows will recreate both folders. This sequence is Microsoft’s documented Windows Update component reset.^1^

Do not manually take ownership of or delete the entire WinSxS folder.

3. Check non-Microsoft file-system filters

Uninstalling antivirus covers only part of the third-party interference check. Security, backup, encryption, and storage products can leave file-system filter drivers installed.

In an administrative Command Prompt, run:

fltmc

Identify any non-Microsoft filters. If one belongs to software that can safely be stopped, unload it temporarily:

fltmc unload <DriverName>

Repeat for other non-Microsoft filters, restart, and retry the update.

Caution: unloading a filter can temporarily disable protection, backup, encryption, or storage functionality. Do not unload an unknown filter; instead, update or temporarily uninstall its associated application. Microsoft includes this check in its 0x80070005 procedure.^1^

Applicability and escalation

KB5126657 applies to Windows 10 22H2 under Windows 10 ESU, and to Windows 10 Enterprise LTSC 2021 and IoT Enterprise LTSC 2021 for version 21H2. Its published known issue concerns USB Audio Class 1.0 devices, not installation error 0x80070005.^3^

Run winver and verify that the installed Windows edition/version is eligible for this update. If it is not enrolled in or licensed for the applicable servicing channel, permission repairs will not establish update eligibility.

If the ownership command still returns Access Denied, or installation still fails after the reset and filter-driver check, generate a fresh log:

Get-WindowsUpdateLog

Also retain C:\Windows\Logs\CBS\CBS.log, then contact Microsoft Support. The official procedure recommends escalation after the permission, component-reset, system-repair, and third-party-filter checks fail.^1^

References