Since this is not actually any project related to or affiliated with Ubuntu you should probably ask over at wubuntu.org … nobody here will know how that iso got put together, what is in it or what bugs are introduced by modifying the ubuntu install as they did …
In case you decide to go with a normal Ubuntu install (or any of its official flavours) we can indeed help, so feel free to come back at any time with questions related to this
The download page for wubuntu which I had never heard of, suggests using Etcher rather than Rufus or the dd command from Linux. It’s some modified Ubuntu and you do not need to install an actual Ubuntu first.
I would not touch Wubuntu with a hundred-foot pole.
I would urge you to select literally any other Linux distribution that one, even one that isn’t Ubuntu. They have a track record of being insecure, and very poor at managing user data. Please, reconsider using it.
@rubi1200 - Thanks. On it already Just installed Kubuntu flavour on VirtualBox.
As I have been with Microsoft from day 1 (40 years or so ago ) it will take me some time to get used to ubuntu and that’s why I was looking for something closed to windows to make the transition a bit easier… and now I am sorry I never got involved with Unix when I had the opportunity