What to do and how to get windows 10 back

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Karen 1971 - Updated on Apr 16, 2017 at 04:34 PM
Hello,

My son has a gaming pc and it was turned of when it was updating,now when we turn it on we get the start up screen flash on then blank screen with white dash in top left hand corner. Please can you advice what to do and how to get windows 10 bk thank you

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