I was multibooting an EFI laptop. The laptop was using GPTs, was using SecureBoot, and it had Windows 8.0, Ubuntu, Fedora and Debian on it.
I updated the laptop to Windows 8.1 through the free App Store update because I could not get security updates and bug fixes for Windows 8.0 and IE 10.
Now, I can no longer access any of the other operating systems. It appears Windows 8.1 blew out the other GPTs during its upgrade, and not just its own GPT. I don't see any other disks under Disk Management; and the EFI's boot screen (not the Windows Boot Menu) does not list any other operating systems.
I have two questions:
- What happened to the other GPTs and Operating Systems?
- Is there anyway to undo what this plague known as Windows 8.x has done?