The problem was with the heatsink, it wasn't connected correctly, now the temperatures are normal again.
My CPU: Intel Pentium Dual-Core E5700 @3.00 GHz
Few days ago, I checked my CPU temperatures, they were 70-80 C, so I thought of changing my thermal paste, which was actually pretty dry since it wasn't changed for 5 years. When I changed, I checked my temperatures again, and they were increased, idle was 100 C. I didn't even want to test the full load. I have no overclock. Help anyone?

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