How do you securely delete deleted temporary internet files on your computer that become stored in a computers harddrive?

Temporary computer files?  Do interenet files stay on harddrive?  How do you delete items on harddrive?  Where exe files are stored in computer?  Can you see a computers deleted history?  How do you find your computers harddrive?  How do you clear temporary internet files?  How do you retrieve deleted internet files?  How do you retrieve deleted temporary files?  How and when should you delete temporary files?  How can you clean your computer harddrive files?  How do you get to the harddrive of your computer?  Where do internet files go after they are deleted?  How do you delete your computers history for good?  How do you ereas the harddrive from your computer?  Where do you go to retrieve deleted internet files?  How do you delete deleted files from your harddrive?  How do you delete all the internet files you loaded?  How do you delete internet passwords off your PC computer?  How do you delete pictures stored on computer from internet?