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Error 0x800B0109 means that a certificate string has been processed but ended with a root certificate that the trusted provider does not trust.
One of the steps is also to install the client certificate on the local computer, which must be derived from the root certificate used in the VPN configuration. This is the basic authentication mechanism used by the Azure gateway. However, if you have done so and still receive the above error, then the gateway certificate (client certificate) does not seem to be correctly installed on your local computer.
When installing patches deployed on client computers via SCCM, the installation fails with error code 0x800b0109 and the error message “A certificate chain processed but terminated in a root certificate which is not trusted by the trust provider”. This error occurs when the certificate signed with patches is missing from the client’s certificate list.
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To solve this problem:
The signature certificate must be imported into the Trusted Publishers and Trusted Root Certification Authorities store on the client machines so that they can trust third-party updates.
“The option “Allow content signed from the Microsoft Update Service Location intranet” under “Group Policy Management” must be enabled.
Run the Windows Update troubleshooting and see if it can help you
- Press “Windows + X” and select Control Panel.
- In the search box, type Troubleshooting, then click on Troubleshooting.
- Under System and Security, click on Fix Windows update problems.
Delete the contents of the temporary folder.
You can delete all downloaded, failed and pending Windows 10 updates by using the Run command.
Open the Run dialog box by pressing Win+R in combination, type %temp% in the dialog box that opens, and then press Enter. In the folder that opens before you select all files and folders in the Temp folder, then delete them.
temp% is one of the many Windows environment variables that can open the Windows folder calls a temporary folder, usually located in C:\Users\[username]\AppData\Local\Temp.
Clear distribution of the Catroot2 software and folder
When Windows downloads updates, they are stored in a special folder called Software Distribution. Files downloaded here will be automatically deleted once the installation is complete. Therefore, after stopping Windows Update Service, you must delete all files in the SoftwareDistribution folder. Resetting the catroot2 folder has solved several problems with Windows Update.
https://www.dropboxforum.com/t5/Error-messages/Dropbox-update-error-0x800B0109/td-p/77941
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