My computer randomly freezes and/or restarts

[Ivan Crespo Gadea]

For a week it has been happening. It randomly freezes or restarts without notice or anything. It happens regardless of whatever I'm doing, playing a videogame or checking pdf.Another problem is that the wifi and Bluetooth don't work unless I put an external antena (although I'm not sure if these problems are related, they started at the same time)

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