I ran into this issue too. At this point, my C:\programs (x86)\minecraft directory is gone - I deleted it to get the installer to recreate it. Except the MinecraftInstaller.msi file (Repair) says there already is an account and ignores the launcher's absence. At least I have the old Java launcher.
I ran into this issue too. At this point, my C:\programs (x86)\minecraft directory is gone - I deleted it to get the installer to recreate it. Except the MinecraftInstaller.msi file (Repair) says there already is an account and ignores the launcher's absence. At least I have the old Java launcher.