Hi. My name is Lester, and I am an Independent Advisor. I'm sorry that you are experiencing this issue. I'd be more than happy to assist you.
Have you installed any new software before encountering the Windows Update issue? Sometimes, errors may occur during the update to the latest version of Windows 10 due to third-party antivirus or security software. Try disabling it and then run the update again. If the issue persists, please attempt the following:
Method 1: Temporarily disable any active third-party antivirus program, such as Bitdefender, as it may be interfering with the update.
Method 2: Run the Windows update troubleshooter
Click the Start Menu> Go to settings(gear icon) > Update and Security > Troubleshoot > Other troubleshooters.
Next, under Most Frequent, select Windows Update and click on Run > Follow the screen prompt
Method 3: Reset Windows Components
Enter "Command Prompt" into the Windows search box, then right-click and select "Run as administrator" to proceed. After the Command Prompt opens, input the following commands and press Enter after each:
net stop bits
net stop wuauserv
net stop appidsvc
net stop cryptsvc
Ren C:\Windows\SoftwareDistribution.old
Ren C:\Windows\System32\catroot2 Catroot2.old
net start bits
net start wuauserv
net start appidsvc
net start cryptsvc
Restart your PC then try to update again.
I hope this information is helpful. Please don't hesitate to reach out if you have any more questions. Thank you