You may be using the extention and not kow it File Extension KMZ
Download TFC by Old Timer TFC - Temp File Cleaner by OldTimer - Geeks to Go Forums
and save it to your desktop. Save any unsaved work
. TFC will close ALL open programs including your browser!
Double-click on TFC.exe to run it. If you are using Vista/Windows 7 right-click on the file and choose Run As Administrator.
Click the Start button to begin the cleaning process and let it run uninterrupted to completion. Important! If TFC prompts you to reboot, please do so immediately. If not prompted, manually reboot the machine anyway to ensure a complete clean