I installed Unity 2018.4.4f1 through the HUB a while ago. Today I wanted to uninstall it, because I just installed a newer version. I hit the 2018.4.4f1 "Uninstall" button in the "..." drop-down and Unity HUB started to uninstall. After about an hour and still uninstalling, I thought something doesn't seem right here. A regular uninstall through the "uninstaller.exe" normally takes maybe a minute. Looking at the installation directory shows HUB uninstalled everything than two .h files. Trying to delete the file through Windows Explorer shows this issue: I'm a local admin on this PC though. Whatever Unity HUB installed earlier, seemed to have messed up permissions. Checking the permissions for the file shows: Clicking the "Continue" buttons shows: Is this a known issue? Can I expect that future HUB versions fix those permission issues of earlier installed Unity versions?