I'm afraid I've messed up my son's portable PC by trying to install Linux alongside Windows 8.1. I've set up many dual-boots in the past, but it turns out this new UEFI hardware is much trickier.

What is the GPT protective partition? Why is my disk showing as GPT protective partition in Disk Management? How to fix a GPT protective partition without losing data and regain access to it? In this ...