Run the Windows Update Troubleshooter.

https://support.microsoft.com/en-us/windows/win...

If it persists, rename the software distribution folders as instructed below:

1. Open Start and type cmd, right-click on "Command Prompt", and select "Run as administrator".

2. Run the following commands at the Command Prompt one at a time:

net stop bits

net stop wuauserv

net stop cryptsvc

ren %systemroot%\softwaredistribution softwaredistribution.bak

ren %systemroot%\system32\catroot2 catroot2.bak

net start bits

net start wuauserv

net start cryptsvc

3. After all these commands are completed, close the Command Prompt window, restart your computer, and then try to update Windows.

If it persists, use the system file checker to repair possible corrupted or missing system files.

1. Open Start and type cmd, right-click on "Command Prompt", and select "Run as administrator".

2. Run the following commands at the Command Prompt one at a time:

dism.exe /online /cleanup-image /scanhealth

dism.exe /online /cleanup-image /restorehealth

dism.exe /online /cleanup-image /startcomponentcleanup

sfc /scannow

3. Then restart your PC and see if you can update.