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The iMac is Apple's line of all-in-one desktop computers.

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Why is my computer turning itself off,and on again

My computer keeps turning off ,and then rebooting,I can,t get it to stay on for more tan a minute.idid update a couple of things yesterday,and it has been like this since then, can anyone help please

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Can you tell us your exact model it would help us help you!

Go to this web site: EveryMac - Lookup plug in your systems S/N it will report back your systems specs. Paste a link to the page it shows you so we can see what you have.

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Please tell us about these updates and if they completed.

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Thank you very much ,I followed Scott’s advise,and it solved my problem,I am delighted

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last time i had this issue, it was on my Desktop PC and my Processor had an intermittant failure.

however, there are plenty of other causes for this.

i would start with a simple repair function,

if repairing doesnt work, then run a factory reset on the device to wipe all data.

if not, then start looking into hardware issues. (Processor, Mobo, Thermal sensors, PSupply, etc)

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sheila wilson will be eternally grateful.
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