I have solved the issue of the viewport crash freezing my whole system.
Thanks to the suggestion of Revocolor, he recommened turning off Intel Integrated GPU from the bios. It was already off, but there was another setting in the same menu called Primary Display. I switched it from AUTO to PCIE, and now everytime the viewport crashes when I am modeling, it no longer freezes my whole system.
This doesnt solve the viewport crashing, but I can tolerate the crashes as long as the system doesnt freeze up. I am very happy about that since now all I need to do is just restart cinema4D and not the whole machine.
Once again thanks to Revocolor for pointing me in the right direction.
it took me two weeks to figure this out.
NEVER GIVE UP GUYS!
hopefully in the future, this can help others going through the same experience.
LLS's post in Cinema4d viewport crashes my whole computer when modeling. was marked as the answer