How to remove the internet files (which has seen previously) in C/ drive?

In Internet explorer .. go to Tools.. then internet options... then Delete Files
http://answers.yahoo.com//question/index?qid=20060617110559AAagddt

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How to Remove Hidden Flash Drive Files?

To remove hidden files from your flash drive, you're going to have to set your file manager to view them -- a relatively simple procedure that varies depending on how your operating system. Keep in... Read More »
http://www.ehow.com/how_8487765_remove-hidden-flash-drive-files.html

Each time you delete a file from your hard drive, the Windows operating system saves it to the Recycle Bin. The Recycle Bin is an archive directory filled with the files you have deleted from the s... Read More »
http://www.ehow.com/how_6562690_remove-deleted-files-hard-drive.html

Go to "Tools" > "Internet Options". Then about half way down the menu that pops up, you should see "Temporary Internet Files". Just click on the button that says "Delete Files" and then confirm by ... Read More »
http://answers.yahoo.com//question/index?qid=20061106054928AAUBxNk

For the most basic of cleaning tasks, use Windows 2000 and XP's own built-in tools:
http://www.wikihow.com/Remove-Hidden-and-Useless-Files-from-a-Hard-Drive