68c is too high. Have you noticed if you can use the laptop longer on a desk instead of your lap? I know its ironic, but alot of laptops overheat when on your lap. This is because you cover up the vents on the bottom of the laptop. To solve this, buy a cooling pad:http://www.newegg.com/Product/Product.aspx?Item=N82E16834980010
This will keep the laptop nice and cool.
68c is WAY TOO HIGH!!!