Download CCleaner and run that on every profile on your computer. This will remove all systems based temp files, ie based temp files..all this stuff you wish to vanish

or you can do it via the control panel/internet options then delete IE history, temp files, and all cookies..or manually delete all the files in these folders..
C:\Documents and Settings\%USER%\Local Settings\Temporary Internet Files
C:\Documents and Settings\%USER%\Local Settings\Temp
C:\Documents and Settings\%USER%\cookies