If your using a Ryzen CPU which im guessing you are from the image you posted, Then i would suggest you use RyzenMaster to check for avg cpu temps, core voltage & core state for monitoring instead of HWmonitor, you can get it here. Reset everything to defaults (change XMP so that ram runs at its full rated speeds) and use Balanced or Ryzen Balanced power plan then check Ryzen Master again for any changes and see if the problems still persists (freezing/hangs etc).
Normaly you should see voltages going up or down (1.2v - 1.4+v) depending on activity with some cores going into sleep mode when system is idle, Also you should see core voltages go up/down from 1.2 - 1.3+ when watching youtube and any other videos online which is normal behavior for ryzen 3k CPUs. What isnt normal though is if your voltages are stuck at 1.4 or 1.5 with all cores usage actively going up and down with no cores going in to sleep mode while idle, it usually means theres something (a background program, process & sometimes drivers) thats using up system resources in the background hogging up system resourcess, if so then you should actively look for them and kill/disable or uninstall whatever it is, afterwards check if system is running nomaly again or if the freezing has stopped.
If not then try doing bios reset again and or update your bios to the latest non beta version for your board + update your chipset drivers to the latest from AMD download section here if you havent already, then check again if everything is running normal in windows after rebooting.
