Updating and Troubleshooting Windows 8 Update Problems
Method 1 – Download the Latest Windows 8.1 Update
Ensure you have the latest version of the Windows 8.1 update installed.
For reference, one of the updates is:
Windows Update Client for Windows 8.1 and Windows Server 2012 R2 – March 2016
Installing the latest update can resolve many update-related issues.

Method 2 – Reset Windows Update (if updates fail or crash)
Open the Start menu and type cmd.
Right-click on Command Prompt and select Run as Administrator.
In the Command Prompt, type each of the following commands one at a time, pressing Enter after each line:

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


⚠️ Note: These commands stop Windows Update services, rename the update folders to reset them, and then restart the services. This can fix update errors or crashes