I closed GOG (which required opening the Task Manager and killing a few processes manually), deleting all the downloaded data, cold-rebooting the computer, and starting again.
It got stuck at 62.15 GB, 92% again.
Now I'm trying a different version (1.5 instead of 1.52) and seeing if that makes a difference.
EDIT: wow, this time it got stuck at 62.14 GB out of 62.15
may that can help .
windows can mess around with some install app .
before a fresh install
clean cache , temp file ..( check on windows setting HHD management )
on windows parameter uninstall the app cyberpunk
go on folder GoG , Game , and delete Cyberpunk 2077
check if there's not any olher file connected to cyberunk ( delete all of them )
install folder can be issues , check if GoG and Cyberounk 're on the same drive
first run GoG as administror , same for Cyberpunk
check windows defender , GoG services or other conntected file having all bypass for windows defender