Laptops need to be shut down. They aren't meant to stay running. Heat being one of the main issues.
My PC runs for weeks on end without me shutting it down and I've never had an issue. I know it is recommended to shut it down about once a week. I'll shut my PC down during bad storms or when I'm gone for more than a day, but other than that, I'm not real good at sticking to the once a week shut down. I just never really think of it.
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