
Here’s how you can fix the security certificate error while trying to download Widnows 7 update;
Visit this URL in your Chrome browser;
https://catalog.update.microsoft.com/
Click “Advanced” and then click “Proceed to catalog.update.microsoft.com (unsafe)”
In the search box, enter your desired update name i.e. KB4534310

Click the “Download” button next to your applicable OS update;

In the pop-up box, right click the download link and click “copy link”;

Open a new browser tab and right-click “Paste” and then press ENTER;
The download of your desired Widnows 7 OS will start. Simply double-click the downloaded file to install the Windows 7 update.

Installer encountered an error: 0x800b0109
A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider.