"Thermal Event"?
Answer:
Your computer is overheating. Either the fans arent working or are clogged near dust. Open it up and clean as much dust as you can out of the boil syncs (large metal radiators) and fans. If it keep doing one or more of the fans might obligation to be replaced. Most dells single have one disciple so it should be a quick and cheap replacment.
You can also travel into the bios during startup and change the temp the computer shuts down at. This is not recomended because the cpu shutdown is designed to prevent the computer from detrimental itself and if you turn off thermal shutdown the adjectives thing can litterally fry.
Typically this mode that your machine is overheating. Either the CPU core is getting too hot, classification that the CPU cooler is not functioning properly, or the case fan(s) are not operating properly and the system temp is too big. PCs shut themselves down based on Temp which can be modified contained by the system BIOS.
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