if your bios shows your temp as 19C, you shouldnt really worry about your temps at all. But if you really want to get a program to read your temps in windows, you should get a program with your motherboard on cd. Asus comes with "Asus Probe", Gigabyte comes with "Easytune 4"
The are ones out there for universal, but I think the are un accurate. Go to www.download.com to have a look at them. speed fan is the only one I can think of.
and heres another tip. Dont use Everest, in my experience and that of many others the temperature reading given by that program is usually much higher than it actually is.