I did 13.2 to leap 42.1 then upgrade to 42.3 on my system and all has worked great. On my friends machine which is identical hardware we did clean install from usb drive and her system is plagued with a continuous cycle of going back to login screen if she tried to work with anything like set-up or dolphin. I had her check the checksum on the file we used to create the usb and it shows correct. Install worked perfect without errors.
Tried immediately to do updates in desktop. and while it was checking for updates it said Kernel panic and locked up. Next try dropping to superuser terminal immediately after start-up issued zypper up and it installed 128 updates and added 516 dependencies to resolve. seems to be running fine now as it needed to reboot.
Thanks, was quite perplexed as we are 3000 miles apart and she doesn’t do so good with Linux.