Hello and welcome to Bleepingcomputer.
Lets get a second opinion by using other programs that does the same thing as Speed fan.
Here is two programs.
First, because the programs above are freeware, I suggest during installation you disregard any options to install any tool bars for your browser, such as the Ask.com or Google tool bars.
Those options are displayed in the box that asks if you want to add quick launch short cuts, I personally feel those tool bars are not needed.
The Speccy web site at piriform.com only asks for donations, you do not have to donate if you do not wish too.
It also explains how to use the program.
There are a few sensors in this program that display as green gauges and rise and fall along with the current sensor temp.
The menus on the left side of speccy can be clicked for more information on each category, such as CPU, Graphics or hard drive details.
HWMonitor is similar to Speed fan, the difference is HWMonitor does not load a pre-determined threshold like speed fan does.
With Speed fan you can download and use another computer owners pre-determined temperature range for a particular computer setup from the Speed fan web site.
That is not the case with HWMonitor.
Use all three programs to determine what sensor is sending the 100 degree Celsius reading.
Edited by MrBruce1959, 07 November 2010 - 09:48 AM.