It may be the GeForce 210 is inadequate for the latest drivers/updates/performance.
Using free software like Speedfan, CPUID, and GPUID may help identify problems.
Use these to track utilization of resources. Software voltage reading are notoriously inaccurate, (as are some temperature readings). Bios is likely the best voltage readings. Temperature sensors are not calibrated, usually intended only for accuracy at high temps.
You may need to clean dust from heatsinks CPU and GPU.
Please Identify the power supply so we can tell if it is likely to operate at less than rated power.