Computer Restart Issue (only happens with wow)

Okay so today I’ve basically flipped the table due to an issue with uldir restarting my pc which is the only place It does this apart from one instance of it doing it twice back to back

now I had a look at my cpu temp using HWMontior
imgur /a/FWghqS2
to see if that was the cause now I’ve done everything the other posts have said to prevent the resets but when it happened outside of uldir I figured it had to be something else

now that first screenshot is just sat idle but when I have wow running it jumps like 40 degrees imgur /a/KrA8YxH
and I have no Idea why

i’ve ordered some new thermal paste and I’m gonna redo that but is there anything else it could be cause my pc doesn’t restart like that in any other game.
it’s just wow and like I said nearly always in uldir apart from the instance mentioned above which made me clean down the case and order the paste

It might also be worth mentioned I was streaming for 3-4 hours last night with 0 issues before cleaning everything

all suggestions and recommendations welcome

CPU- Intel I3 6100 (I know it’s not top tier)
Graphics - GTX950
8gb ram
WIn 10