It seems that your BIOS is reporting a critical Thermal event as the laptop is getting heated up very fast when you are playing games, the cooling is not sufficient provided by your inbuilt cooler. Do the following steps:- 1. Clean up laptop vents. DO NOT KEEP your laptop on a flat surface like your BED which will obstruct the intake of the vent for the laptop fan, 2. Service your laptop, change your thermal paste . You might have damaged your Motherboard already. 3. Do not play on your laptop for over 3-4 hrs and make sure your laptop is seated on a very nice cooler. Better to sit in Air Conditioned room.
My Dell Inspiron 5459 can no more take on even lower end games like Asphalt9, earlier it could play heavy games like Forza Horizon 4.   Whevever I try to open a game, either the laptop shuts down while loading the game, or it shuts dowm within a few seconds after a game  is loaded. All existing game settings are on low already. Pls help, below is config:   Dell Inspiron 5459 i5 6th Gen 8GB DDR3 RAM 1TB HDD 500MB SSD INTEL GRAPHICS 520 AMD DEDICATED R5 335 GRAPHICS WIN 10 HOME   Do note that the issue has recently come, earlier I could even play high end games on it Thanks   OS Version: Microsoft Windows 10 Home, 64 bit, Build 19043, Installed 20210925234417.000000+330Processor: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, Intel64 Family 6 Model 78 Stepping 3, CPU Count: 4Total Physical RAM: 8 GBGraphics Card: AMD Radeon (TM) R5 M335Hard Drives: C: 465 GB (342 GB Free); 931 GB (903 GB Free);Motherboard: Dell Inc., s/n /64K5362/ /System: Dell Inc., ver DELL - 1072009, s/n 64K5362Antivirus: Windows Defender, Enabled and Updated
Low end gaming no more loading, laptop switches off