How to Fix Windows Update Error 800B0109 on Windows 8,10, & 11

You might encounter the error code 800B0109 when you try to install a Windows update or update an individual app. However, this error is rare and only some unlucky people face it. In this guide, I will let you know the ways to repair the 800B0109 error.

Error Message:

The installer encountered an error 0x800b0109. a certificate chain was processed but terminated in a root certificate that is not by the trusted provider.

How can I fix the update installation error 800B0109?

Mostly this error occurs when your Windows update components are corrupted or there is some malware infection. Apart from it, due to corrupted system files, missing DLL files, corrupted driver software, glitches in the registry file, and outdated windows update files cause the same problem.

Method 1: Fix using the Advanced System Repair Tool

To overcome this issue, you need to optimize Windows by removing all these bugs and repairing the system files using the Advanced System Repair Pro utility. This tool scan, fix, and optimize the Windows operating system and removes the error messages.

Windows is made with huge number of dll files, exe files, sys files, various types of services, databases, etc so, it is not possible to keep monitoring all the files always. A brilliant PC Optimizer tool repairs damages, fix errors, update windows and drivers, and eliminate various types of errors silently.

Outbyte PC Repair Tool does all the above task easily and provides you an errorfree and smooth Windows environment to work so that you can focus on your business only.

3 Steps to Fix this Error
Step 1. Download Outbyte PC Repair Tool [File Size: 16.4 MB]
Step 2. SCAN your Windows PC
Step 3. Click Fix button to Repair Error

Method 2: Repair Windows Update Components

This is one of the tested methods to fix any kind of update-related issues in Windows PC. By resetting Windows update components, you allow the update service to download a fresh copy of update files from the Microsoft server. Sometimes the corrupted update files reside in the Windows update directory which disallows to download and install the next version of the update files.

Step 1: Open the elevated command prompt and run the following commands one by one.
net stop cryptsvc
net stop bits
net stop wuauserv
ren %systemroot%\softwaredistribution softwaredistribution.bak
ren %systemroot%\system32\catroot2 catroot2.bak
net start cryptsvc
net start bits
net start wuauserv

The following article provides a detailed guide on how to Reset Windows Update Components manually.

Method 3: Temporarily disable third-party antivirus

You must try installing updates after disabling the third-party antivirus program temporarily. There may be chances to block the update process by your security program. Disable it for a few minutes and then install Windows updates.

Method 4: Scan and Repairs Hard driver errors

If there is corruption in the file system then you will surely get the error code 800B0109 when trying to install updates. You must scan the hard drive for errors and repair them if founds any.

Step 1: Open the elevated command prompt.
Step 2: Run the following command.
chkdsk/f C:
Step 3: it will start scanning Drive C. It may take a slightly longer time based on the size of your Drive.

Method 4: Run the DISM command to restore the system files

If there are missing/corrupted/damaged system files, you will get various types of error messages on your Windows computer. It is advisable to run the DISM command to restore corrupted/damaged/missing system files.

Step 1: Open Administrative Command Prompt.
Step 2: Run the following command and wait till completing the process.
DISM.exe /Online /Cleanup-image /Restorehealth
Step 3: Run System File Checker tool
sfc /scannow
Step 4: Reboot your computer.

Method 5: Perform a Clean start of Windows

When you force the PC to start in Clean Boot mode, Windows gets started only with minimal software and drivers. It only loads the software which is necessary to boot the PC and avoids all other third-party software and drivers.
Follow the article to start the PC in clean boot mode.


In this article, I discussed on how to fix the Windows update error 800B0109. If you get new ideas to fix this problem, must share your thoughts in the comments.