I DL (downloaded) kdewin-installer-gui-1.0.0.exe then ran it ; I chose MinGW64 & a nearby mirror. I then got to the packages/applications menu then selected only Okular but a bunch of dependencies were to be also installed.

The process started and some minutes in, I'd say > 10, my AV (Anti-Virus) program was triggered on 2 programs from it, including the installer ; the other was allowed by default but the installer was blocked by default. I did not know how to allow the application to continue (blocked installer) for I messed with the program a couple minutes and when I left the AV window, both programs had icons reflecting they were allowed. Soon after the installer crashed.

I ran the installer again, hoping there would be verification on what was properly installed and what wasn't done right would be fixed and what wasn't installed yet would be. I could not select Okular from the package list ; suggesting the installation was proper. Moreover, Okular icon was added to the Windows menu for KDE (KDE Release > Graphics > Okular (Document Viewer)) but when I click on it there's an error popup entitled

Microsoft Visual C++ Runtime Library

with content text

The application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information.

then windows give the crash notice for the program (which if a service is allowed will give an option to notify Microsoft, which I forbid (the service from running)).

Now is there a way to have the program I want, in this case Okular, running properly without removing it and all its dependencies being > 100 Mb? Perhaps there's a repair mode? Or a manual way to checksum packages then see which doesn't fit then uninstall them. Also what about packages that wouldn't be installed installed at all during the program installation , likely part of dependencies? Is there a way to have them detected as as uninstalled? Or to flag them as so?

I can install Okular_Standalone_4_win - A simple Okular Installer for windows(tm) users but I'd rather use it as part of KDE on Windows.

Thank you kindly for your help

Update 1:

Changed title from

AV blocked installation many mins after installation started

to

Reinstall bad parts, install mising parts - AV blocked

.

I'm pretty sure your AV has blocked them as a false positive.

Do a fresh install of KDE but this time disable your AV, after the installation is finished re-enable it and if it does pop up with a program from being blocked, you can send a false positive report to the company of your AV program.

My issue was also to not have all its dependencies, being > 100 Mb, downloaded again.