Hello Sandeep, thank you for posting in the Microsoft Q&A community.
Windows update failures typically occur due to corrupted Windows Update cache folders, underlying system file or component store corruption, stopped essential services (such as BITS or Cryptographic Services), or third-party interference like an antivirus program blocking the installation.
To resolve this, the standard approach is to verify system integrity and reset the Windows Update components. Please open Command Prompt as an Administrator and run the following commands to repair your Windows image:
DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow
Once the system scans are complete, proceed to reset the Windows Update cache by stopping the relevant services, renaming the cache folders, and starting the services again. Run these commands sequentially:
net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver
After executing these commands, restart your machine and attempt to install the updates again via the Settings > Update & Security menu.
If the installation still fails, a highly effective workaround is to install the patch manually. Check your Windows Update history for the specific KB number that is failing (for example, KB1234567). You can then search for that exact KB number on the official Microsoft Update Catalog, download the .msu standalone installer file corresponding to your operating system version, and run it manually.
Reference: Troubleshoot problems updating Windows - Microsoft Learn