who think about that his system will not working after doing
everything as it has to be. can you tell me any other distro
(including windows!) where the system installer not working after
upgrade?
It happens all the time on lots of systems. I've had it happen on debian
upgrades, slackware upgrades (granted that was looooooooooooong ago) and
many fedora and rhel upgrades.
can you tell me even one such distro+release when this happened?
it's never happened with any of the redhat, fedora, rhel releases.