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Sudden freezes on High Sierra

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Hi everyone. I installed MacOS High Sierra on my computer 3 months ago, in January. After a long way to get the computer fully working now I'm facing a new problem: imagine I'm working or doing something in my computer and it suddenly freezes and I have to restart it.  There's no reason why the computer restarts by itself...

Here I also attach my Clover EFI folder in case you need it (it doesn't allow me to attach it so here i give you the link: https://mega.nz/#!92xCiLDZ!WY1F55ZvuP-9WW369EP9KY-3hNLt5sWUgJDxPrbgpPM .

Thank you in advance.


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