HWMonitor

This is what HWMonitor looks like
It shows the temperature taken by the thermal sensors inside your computer
Usually you will have no use for however it can act as a diagnostic tool such as computer slow downs especally graphic cards during intense gaming.Above all else isn't it interesting to know how hot is your internal component running?
The software is from CPUID team at http://www.cpuid.com/
Things to note about this applet
1)Small in size
2)No install required to uninstall just delete it
The software is obtained from their website in 2 versions 32bit and 64 bit
32bit is for all standard Windows XP 32bit and Vista 32bit
64bit is for those 64bit Vista Edition there is also Windows XP 64 bit edition but you rarely come across it.
To know what operating system you are running simply right click "My Computer" and select "Properties"
http://www.cpuid.com/hwmonitor.php
Glossary
ACPI a power management technology implementation built into recent systems
AMD Turion X2 refer to the dual core AMD Processor core#0 and core#1
GPU refer to the graphic card temperature
While HDD refer to the Harddisk temperature obtained from SMART (Self-Monitoring, Analysis, and Reporting Technology)