Windows: install and open HWMonitor, Core Temp, HWiNFO, or MSI Afterburner
Windows: open Task Manager for basic CPU usage, not temperature
macOS: use iStat Menus, Macs Fan Control, or TG Pro
Linux: run `sensors` after installing `lm-sensors`
Linux: check `/sys/class/thermal/thermal_zone*/temp`
BIOS/UEFI: restart your PC and check the hardware monitor or system health screen
Use your motherboard or laptop manufacturer’s monitoring software
Check CPU temperature in your PC’s fan-control or gaming utility
Compare the reading with your CPU’s safe temperature range
Check temperature while idle and under load
If temperatures are high, clean dust from fans and heatsinks
If temperatures are high, verify that all fans are spinning
If temperatures are high, reapply thermal paste if needed
If temperatures are high, improve case airflow