I haven't tried this but here's a possible solution:
http://www.winhelponline.com/blog/get-classic-sticky-notes-windows-10-anniversary/
If you’re not going to use the new features (Cortana integration, Ink)
of the modern Sticky Notes app, you can get the classic desktop
version (StickNot.exe) after upgrading to the Windows 10 anniversary
update (v1607) build.
If the C:\Windows.old…Windows\System32 directory is still intact,
simply copy “StikyNot.exe” to your Windows\System32 folder and create
a shortcut to it on your desktop. Also, make sure you copy
StikyNot.exe.mui file from “Windows\System32\en-US” folder (for
English language version of Windows), and place it in the same path in
the target computer. The program still works in Windows 10 version
1607.
Another option would be to obtain the ISO image of 10586.494
(preferably) and extract the two files StikyNot.exe and
StikyNot.exe.mui using 7-Zip or similar archive utility.
If none of those options are feasible, you may download it from this
site.
This is what happens with I mount the Win10 Ent. 1809 ISO and run setup.
Your screenshot indicates you are attempting to install a different edition of Windows then you currently have installed. This means if you have Windows 10 Enterprise installed, you must use a Windows 10 Enterprise 1809 ISO, and it cannot be the trial ISO.
Is there a KB I can download and manually install?
No
Apparently there's an issue with Win10 1809 that breaks Intel VT-d (or causes an incompatibility, rather) which 100% a show-stopper for me.
VT-d isn’t required to use VMWare Workstation, which is the reason, you would need VT-x to be enabled.
Even if you actually need it enabled, all you would need to do is disable it, until the upgrade to Windows 10 1809 is complete.
So apparently I am stuck with Win10 1803 for the foreseeable future
You need to download the correct ISO, for the edition of Windows 10, you currently have installed. Once you have an ISO, mount it within Windows, and launch the installer from within Windows.
Here are a bunch of sources for that ISO: Where can I get a clean ISO of the Windows 10 Creators Update (Build 15063), FCU (Build 16299.15), April 2018 Update (Build 17134.1)?
Apparently there's an issue with Win10 1809 that breaks Intel VT-d (or causes an incompatibility, rather) which 100% a show-stopper for me.
I was able to find a single source, that indicated this might be true, but whoever submitted it wasn’t able to communicate very well. It really was complete nonsense, I can absolutely confirm that, Windows 10 Version 1809 does NOT have, an issue with VT-d. This single source, isn’t even worth quoting, because it made absolutely no sense.
As for your latest error.
Win10 update error 0x800F081F - 0x200004
The installation failed in the SAFE_OS phase with an error during INSTALL_UPDATES operation
it’s caused by Developer Mode, you need to temporarily disable it.
The error 0x800F081F-0x20003 in Windows 10 October 2018 update, appears in systems with the "Developer Mode" enabled.
In order to disable it you must do the following:
Go to Settings image -> Update and Security.
Choose For Developers at the left pane and then check the Microsoft Store apps option on the right pane to disable the Developer Mode.
Reboot your machine
Go to Settings image -> Apps.
In Apps & features settings, click Manage Optional Features
Click the Windows Developer Mode and click Uninstall.
Reboot your machine
At this point you will be able to install 1809 without a problem
Source: Windows 10 October 2018 v1809 Update Installation Failed Error 0x800F081F-0x20003
Best Answer
To run old Sticky Note in Windows 10 Version 1809 aka. October 2018 Update,
StikyNot.exe
needs a compatible DUI70.DLL file (Windows DirectUI Engine). A fair bit of warning, there are many websites which provide DLL files (Dynamic Link Library) for free. DO NOT download them because they may contain harmful malwares.There are many ways to download old Windows 10 ISO files. Here I have choose a tool from HeiDoc.net which uses official Microsoft link to download ISO files. For this procedure, I have used two Windows 10 versions --
StikyNot.exe
andStikyNot.exe.mui
DUI70.DLL
andDUI70.dll.mui
Extract those files from their ISO files respectively. Here are the list of what we need:
The
en-US
folder may change according to the main locale of that ISO file, for example,en-GB
for UK English,zh-CN
for simplified Chinese etc. Copy those above four files in any folder like this:Alternatively, both files can be copied from Windows 7 ISO file. So how did I find the dependency of
DUI70.dll
? Answer, with Dependencies tool (open-source and free) and some trial 'n error. Open theStikyNot.exe
in that tool. It will show many functions are imported fromDUI70.dll
library. The other imported functions are from System32 libraries.