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Hi, first off you need to do a hard reset , which is to press and hold the power on button and whilst doing so press the reset button.
next when it is working, tap on the windows icon top left and select Settings then system, Nexr select System Information and check the Line that says ROM Version. Make a note of this and check on Dell.com to se if you have the latest version. If not upgrade.
However the hard reset should cure your problem. If not and the screen still freeses, thenmake sure that their is not a screen protector fitted ( remove if their is). If still no joy, then it might just be that it is beyond saving,
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Drifter
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