You need to provide more information. Most likely temperatures are fine. I assume you got this computer built for you and not from someplace like Dell? If you got it from Dell or someplace, ask them for support. If not, ask the person who built it for you.
First likely suspect is the Power Supply, but could be a number of things.
The ITE IT87 is just the integrated sensor system on your motherboard. You seemt o have a hot spot going on at tempin2, it might be your northbridge but i dont know why that should be getting hot unless its heatsink is loose.
Can you post your full system specs so we have a better idea of what we are working with? Please link to the power supply and ram if possible. Also did you manually set the timings and voltages of your ram in BIOS? Not doing this can lead to lockups.
There's 2 ways to do it. I think you can make a floppy or usb stick with the bios on it and use the Flash utility in the bios. That's the preferred way of doing it. But you can also do via the Interweb. There should be a utility on the driver disc which you can use to download the latest bios and flash it within Windows. This method is not recommended, but I've done it losts of times and hasn't failed me yet (knock on wood).