I use W10 Home and this to control updates:
Stop Windows 10 Updates Properly and Completely Solved - Windows 10 Forums
The only problem is knowing when to use configurator.cmd if you want store & defender updates.
Also need to use configurator.cmd if manually installing updates such as delta updates instead of cumulative updates.
RE: 1803 update not completing.
Check any tweaks that you've applied to block updates/ upgrades.
Here's some that need fixing before an upgrade will complete:
Any registry tweaks to Block or Defer Upgrades.
Check that services are set to default startup type.
On my machine I'd need to unblock the following to upgrade:
Code:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Windows10UpgraderApp.exe]"Debugger"="mshta \"javascript:var sh=new ActiveXObject( 'WScript.Shell' ); sh.Popup( 'This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator', 10, 'Message!', 64 );close()\""
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Windows10Upgrade.exe]"Debugger"="mshta \"javascript:var sh=new ActiveXObject( 'WScript.Shell' ); sh.Popup( 'This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator', 10, 'Message!', 64 );close()\""
Then I've got start menu replacement/ cortana disabled (not running at all) and other tweaks.
So in my case the best way to upgrade is to clean install having backed up drivers and also with a system image backup or HD clone in place.