If you want to clear internet privacy files(Such as history, cookies, and temp files) automatically on startup, you can simply add this text to your autoexec.bat file:
@ECHO OFF
IF EXIST C:\WINDOWS\SMARTDRV.EXE C:\WINDOWS\SMARTDRV.EXE 2048 16
IF EXIST C:\WINDOWS\TEMP\*.* DELTREE /Y C:\WINDOWS\TEMP\*.* > NUL
IF EXIST C:\WINDOWS\COOKIES\*.* DELTREE /Y C:\WINDOWS\COOKIES\*.* > NUL
IF EXIST C:\WINDOWS\RECENT\*.* DELTREE /Y C:\WINDOWS\RECENT\*.* > NUL
IF EXIST C:\WINDOWS\HISTORY\*.* DELTREE /Y C:\WINDOWS\HISTORY\*.* > NUL
IF EXIST C:\WINDOWS\TEMPOR~1\*.* DELTREE /Y C:\WINDOWS\TEMPOR~1\*.* > NUL
This will erase you internet history files on startup. You can also add other batch statements to be executed on startup here. Be creative!
I'm sure many of you already know about the autoexec file, but many don't, and it beats using a 3rd party application taking up more resources, IMO.
Beware, this will delete all your cookies, history, temporary internet files, and recent documents. And yes, unless you shred these files it is possible for them to be recovered(Shred those porn cookies!

).
-JC