maybe you could try reseating the heatsink, it may not be on well enough, so trying doing that again.. and did you make sure the paste was spread nicely.. i remember somewhere it said when installing to sorta twist it a lil bit to get it spread nicely...
did you try downloading that program to see if it works... and if that is your temp.. i would suggest not doing anything heavy until it goes down.. that more of a load temp than an idol...
also, go in your bios and turn on the warning, set it to 50 degrees or something around there... then your computer should start beeping if it is too hot