"I run Driver Booster..."
Lol, reformat the laptop and start over again. It's the only way to be sure you've gotten completely rid of the damage that crapware caused.
Seriously. Back up your files and bookmarks to a thumb drive, and totally reinstall. Download the Lenovo driver/software tool for your specific machine. If your machine is still crashing, it's a hardware problem. Heat should not crash any modern Intel processor, just cause thermal throttling.
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