Windows Defender unable to update

There is a software restriction policy on Windows Update that has been configured on your PC. If you did not set up this policy that blocks updates via Windows Update, follow the steps below:

Procedure to follow in the order indicated:

1- Open FRST as an administrator by right-clicking on FRST and choosing Run as administrator
2 - Copy the entire script in the box below:

Start::
CreateRestorePoint:
CloseProcesses:
HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate: Restriction 
Task: {79003D2F-4C28-4D40-92F2-97CD1C29191A} - \Microsoft\Windows\UNP\RunCampaignManager -> No file 
ShellIconOverlayIdentifiers: [ ACloudSynced] -> {5CCE71FA-9F61-4F24-9CD1-98D819B40D68} => C:\Program Files (x86)\Acer\shellext\x64\shellext_win.dll -> No file
ShellIconOverlayIdentifiers: [ ACloudSyncing] -> {C1E1456F-C2D8-4C96-870D-35F1E13941EE} => C:\Program Files (x86)\Acer\shellext\x64\shellext_win.dll -> No file
ShellIconOverlayIdentifiers: [ ACloudToBeSynced] -> {307523FA-DDC0-4068-983F-2A6B34627744} => C:\Program Files (x86)\Acer\shellext\x64\shellext_win.dll -> No file
SearchScopes: HKU\S-1-5-21-1010319878-438117629-760683053-1001 -> DefaultScope {AA2D0E11-EE08-41F4-B0C3-BB1F6394BA6C} URL = 
SearchScopes: HKU\S-1-5-21-1010319878-438117629-760683053-1001 -> {AA2D0E11-EE08-41F4-B0C3-BB1F6394BA6C} URL =
Edge Extension: (No name) -> AutoFormFill_5ED10D46BD7E47DEB1F3685D2C0FCE08 => C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\Assets\HostExtensions\AutoFormFill [not found]
Edge Extension: (No name) -> BookReader_B171F20233094AC88D05A8EF7B9763E8 => C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\Assets\BookViewer [not found]
Edge Extension: (No name) -> LearningTools_7706F933-971C-41D1-9899-8A026EB5D824 => C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\Assets\HostExtensions\LearningTools [not found]
Edge Extension: (No name) -> PinJSAPI_EC01B57063BE468FAB6DB7EBFC3BF368 => C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\Assets\HostExtensions\PinJSAPI [not found]
EmptyTemp:
End::

3- Once the script is copied, click on Fix, FRST will automatically take the script from the clipboard.



Let the repair process complete, once it is finished you will be asked to restart your PC. Do it as soon as prompted, see below.
Then once your computer is restarted:
4- You will have a Fixlog file on your desktop, then send these reports to https://www.cjoint.com/ see this tutorial then provide the link generated by Cjoint in your next message.

5- CHECK AND TELL ME IF YOUR PROBLEM IS STILL PRESENT

.

For now, it's impossible to do the security update, but the update is downloading updates, notably one for Windows Defender. This is probably the key to the problem!
Screenshots:
https://www.cjoint.com/c/LFpgJUb8mvV
https://www.cjoint.com/c/LFpgLeSURwV

It's no longer the same error code as before, in this screenshot https://www.cjoint.com/c/LFpgLeSURwV
We can see there are optional updates, try to install them.

If nothing works:
Repair Windows 10 without data loss (everything is kept).
Download this Microsoft tool, open the tool and follow the instructions below:

See you later!