Dell insprion 13 7370 core i7 8th gen fault

The laptop it's shutting down about 30 seconds in windows, sometimes it doesn't shut down some time it does. Still good battery lasts 6hrs, q3" full hd display, 256Gbm.2NVMe, backlight keyboard, Type C charger, core i7 8th gen cpu, 16Gb ddr4 ram. Windows 10. The problem started after I reset windows. Price not negotiable please don't waste my time

ZAR2,000