It's either a false reading, or the voltage regulator temp. If it's the voltage regulators, they run very warm, so that temp wouldn't surprise me, especially on an OEM system where the mobo is unlikely to have heatsinks on the VRM's. That shouldn't really cause the crashing problem though.
Aside from that, your temps look perfectly normal.
+ 1 for the VRMs or false/fake readings. i have seen VRMs on cheap boards idle at 100 C... insane right.. throw a fan over by your VRMS to see if that drops that temp a bit. though they high temps on the VRMS shouldnt really hurt anything unless your are doing some CRAZY OC. and if you are on a cheap board there is your crashing issue.