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It's ok, I've did it. What I did was click on the 'Cortana' button on the bottom left of my screen. From what I remember, it gave me the option of disabling the Cortana feature, which I did. Then - if I remember correctly - the page with the 'recovery' button came up. This time I was able to highlight it, and it responded to my click. The rest was easy, I went according to the method recommended by Buenchico. Close call though. I thought I was going to have to have it professionally repaired