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.
What version of Windows are you using? (Press Windows + R and then type "WINVER," and hit OK.
Method 1: 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 2: 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