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| 1 | +--- |
| 2 | +title: Troubleshoot Windows Update Error 0x80070bc9 |
| 3 | +description: Learn how to resolve the Windows Update error 0x80070bc9 on Windows. |
| 4 | +manager: dcscontentpm |
| 5 | +audience: itpro |
| 6 | +ms.date: 11/6/2025 |
| 7 | +ms.topic: troubleshooting |
| 8 | +ms.reviewer: scotro, mwesley, jarretr, v-ryanberg, v-gsitser |
| 9 | +ms.custom: |
| 10 | +- sap:windows servicing,updates and features on demand\windows update fails - installation stops with error\Windows Update - Install errors starting with 0x8007 (ERROR) |
| 11 | +- pcy:WinComm Devices Deploy |
| 12 | +appliesto: |
| 13 | + - <a href=https://learn.microsoft.com/windows/release-health/windows-server-release-info target=_blank>Supported versions of Windows Server</a> |
| 14 | +--- |
| 15 | + |
| 16 | +# Troubleshoot Windows Update Error 0x80070bc9 |
| 17 | + |
| 18 | +**Applies to:** :heavy_check_mark: Windows VMs |
| 19 | + |
| 20 | +## Summary |
| 21 | + |
| 22 | +The Windows Update error 0x80070bc9 occurs when the OS is stuck in a pending servicing state and the TrustedInstaller service can't clear it due to corruption in the *Transactional Entries* folder. |
| 23 | + |
| 24 | +## Prerequisites |
| 25 | + |
| 26 | +For virtual machines (VMs) running Windows in Azure, make sure that you back up the OS disk. For more information, see [About Azure Virtual Machine restore](/azure/backup/about-azure-vm-restore). |
| 27 | + |
| 28 | +## How to identify the issue |
| 29 | + |
| 30 | +Check the `CBS.log` file located at *C:\Windows\Logs\CBS\CBS.log* for entries indicating this error (0x80070bc9) similar to the following one: |
| 31 | + |
| 32 | +```output |
| 33 | +2025-04-02 07:15:53, Info CBS Session: 31171520_2564643148 initialized by client DISM Package Manager Provider. |
| 34 | +2025-04-02 07:15:53, Info CBS Enumerating Foundation package: Microsoft-Windows-ServerCore-Package~31bf3856ad364e35~amd64~~6.2.9200.16384, this could be slow |
| 35 | +2025-04-02 07:15:55, Info CSI 00000003 CSI Store 616570675040 (0x0000008f8e79df60) initialized |
| 36 | +2025-04-02 07:15:55, Info CSI 00000004 Transaction merge required, do-not-merge flag passed. |
| 37 | +2025-04-02 07:15:55, Info CSI 00000005@2025/4/2:11:15:55.656 CSI Transaction @0x8f8fa30210 initialized for deployment engine {d16d444c-56d8-11d5-882d-0080c847b195} with flags 00000002 and client id [26]"TI5.31171520_2564643148:1/" |
| 38 | +2025-04-02 07:15:55, Info CSI 00000006 Pending transaction content must be resolved, cannot begin another transaction yet |
| 39 | +2025-04-02 07:15:55, Info CBS <span style="color:red"><b>Failed to get transaction analysis because of pending operations. Disposition from Analyze: 0x1 [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED]</b></span> |
| 40 | +2025-04-02 07:15:55, Info CBS Failed to get inventory. [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED] |
| 41 | +2025-04-02 07:15:55, Info CSI 00000007@2025/4/2:11:15:55.658 CSI Transaction @0x8f8fa30210 destroyed |
| 42 | +2025-04-02 07:15:55, Info CBS <span style="color:red"><b>Failed to get CSI Inventory [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED]</b></span> |
| 43 | +2025-04-02 07:15:55, Info CBS Failed to get component state. [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED] |
| 44 | +2025-04-02 07:15:55, Info CBS Failed to get current state of the deployment [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED] |
| 45 | +2025-04-02 07:15:55, Info CBS <span style="color:red"><b>Failed to get Transaction State for package: Microsoft-Windows-NetFx3-Server-OC-Package~31bf3856ad364e35~amd64~~6.2.9200.16384, update: NetFx3 [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED]</b></span> |
| 46 | +2025-04-02 07:15:55, Error CBS Failed to get store state [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED] |
| 47 | +2025-04-02 07:17:55, Info CBS Trusted Installer successfully registered to be restarted for pre-shutdown |
| 48 | +2025-04-02 07:17:55, Info CBS Trusted Installer is shutting down because: SHUTDOWN_REASON_AUTOSTOP |
| 49 | +2025-04-02 07:17:55, Info CBS Stopping Winlogon CreateSession notifications |
| 50 | +2025-04-02 07:17:55, Info CBS Unloading SysNotify DLL |
| 51 | +``` |
| 52 | + |
| 53 | +## Root cause |
| 54 | + |
| 55 | +This error occurs because the OS is in a pending servicing state and the TrustedInstaller service can't clear it due to corruption in the *Transactional Entries* folder. This corruption prevents the completion of update installations and requires a system reboot to roll changes back. |
| 56 | + |
| 57 | +## Resolution |
| 58 | + |
| 59 | +For Windows-based computers, perform an [in-place upgrade](/windows-server/get-started/perform-in-place-upgrade#perform-the-in-place-upgrade). |
| 60 | + |
| 61 | +For VMs running Windows in Azure, see [in-place upgrade on the Windows virtual machine](/azure/virtual-machines/windows-in-place-upgrade). |
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