Greetings, I had a series of update problems on eOS. At first, I interrupted an update because my son urged me to go play with him. Unfortunately, after that, updates didn't work anymore. I tried what was proposed on this page https://www.addictivetips.com/ubuntu-linux-tips/upgrade-to-elementary-os-juno/ thinking it would help me to restore the ability to update. I hadn't made any search about what Juno was. But after that, boot was freezing. Twice I had the boot running more than one hour and a half, but not working. The third time, I could access the command line (the same as with Ctrl Alt F1) and made a few updates. After that, I tried to boot a former version of eOS in recovery mode, and succeeded in upgrading totally to Juno. But I still wasn't unable to boot. My question is : how to repair boot whan it is not working? I am a newbie in Linux. I know there is a "boot repair" command, but would like to use it properly., i.e; with the help of someone more experienced than me. (When I boot and push on Windows + TAB, I have a message Starting Cleanup of Temporary Directories A start job is running for Hold until boot process finishes up (1hour 30 min)? Don't know if it might help) Thanks to anyone tryning to help me.