@JuliaBorgir - In the Options window, clear the check marks in the two boxes, PROCHOT Offset and Lock PROCHOT Offset and then reboot. After you have rebooted, open the Options window. Is there a lock icon near the PROCHOT Offset setting? If the BIOS has locked this setting then leave it alone. You cannot use ThrottleStop to change the thermal throttling temperature if the BIOS has locked this setting.
Unlocked Example
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Locked Example
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Acer has low balled the thermal throttling temperature to 92°C and they do not appear to have left you any options to fix that problem.
You need to improve cooling. A computer cannot perform smoothly if it is thermal throttling. Have you ever cleaned inside your laptop and replaced the thermal paste? There is not much else you can do. Your laptop has a CPU with a 45W TDP rating. When the GPU is active when gaming, the cooling cannot handle the CPU running at half of its 45W rating. Either your cooling system is overdue for some maintenance or your heatsink and fan are poorly engineered or a little bit of both. That is the main problem. Either fix the cooling or use ThrottleStop to run your CPU much slower so it does not constantly overheat.