I had a similar issue on a Dell Latitude a few weeks ago, with installing Mint though. The problem there was that it had an entry in the BIOS that was called something like “Windows Boot Loader”. So Mint could find the OS with the Live USB, but not when starting the Laptop. Turned out, only unchecking that entry didn’t do the trick, I had to delete it in the BIOS and that worked by clicking into the entry, then a button would appear that let me delete it. I only ran into that solution by chance. Maybe you can check the BIOS for any sorts of entries like that. Please let us know how it goes.