About the “Windows Update error 1803” error

The following information on this error has been compiled by Coopoint Technologies, based on the information gathered and reported by our global network of engineers, developers, and technicians or partner organizations.

Description and Symptoms

While you are trying to install the latest Windows 10 update, it may keep failing with the error 1803, which means you face the following symptoms on your systems: When the system restart, the system stuck during the update installation or at Windows Logo and the only method to get the PC back, is to force shutdown the machine using the Power switch.

Causes of this Error

The Window update error 1803 may be caused by windows system files damage. The corrupted windows system files entries can be a real threat to your computer. There can be many events which may have resulted in the system files errors like the following:

  • An incomplete installation or uninstall
  • The improper deletion of applications or hardware
  • A virus or adware/spyware attack
  • An improper shutdown of the computer

Fixing “1803” on Windows

Try each of these methods one after the other, and see which helps you fix the issue.

Fix #1: Use the Windows Update troubleshooter tool

The quickest way to troubleshoot and resolve this issue is to use the Windows Update troubleshooter tool.

  1. Open Settings, click on Update & Security.
  2. Click on Troubleshoot, under “Get up and running,” select the Windows Update option.
  3. Click the Run the troubleshooter button.
  4. Click the Apply this fix option (if applicable).
  5. Continue with the on-screen directions.
  6. Restart your device.
Fix #2: Rename CBS.Log
  1. Click on Windows Start, click Windows Powershell (Admin). Type or copy and past the following one by one and Enter:

    net stop wuauserv 

    net stop cryptSvc 

    net stop bits 

    net stop msiserver 
Ren C:\Windows\SoftwareDistribution SoftwareDistribution.old 

    Ren C:\Windows\System32\catroot2 Catroot2.old 
net start wuauserv 

    net start cryptSvc 

    net start bits 

    net start msiserver
  2. Type following in Windows Start Search box and hit Enter %systemroot%\Logs\CBS > Rename CBS.Log to something else. 
 (Note: If it doesn’t allow you to rename – Type services in Windows Start Search box > Click Services > Scroll down to find the Windows Modules Installer service and double-click on it, and set its startup type to Manual, reboot your computer. Go to C:\Windows\Logs\CBS > Rename CBS.Log > Reboot your computer, then go back into the Services App and set Windows Modules Installer Service back to Automatic Startup.
  3. Click Update now to update to 1803 through Upgrade Assistant.
Fix #3: SFCFix Script
  1. Download SFCFix.exe and save this to your Desktop.
  2. Download the attached file, SFCFixScript.txt, and save this to your Desktop. Ensure that this file is named SFCFixScript.txt – do not rename it.
  3. Save any open documents and close all open windows.
  4. On your Desktop, you should see two files: SFCFix.exe and SFCFixScript.txt. Drag the file SFCFixScript.txt onto the file SFCFix.exe and release it. SFCFix will now process the script.
  5. Upon completion, a log should be created on your Desktop: SFCFix.txt.
  6. Copy (Ctrl+C) and Paste (Ctrl+V) the contents of this into your next post for me to analyse please – put [CODE][/CODE] tags around the log to break up the text.

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