So, you basically want an automatic copying to the clipboard, right? In other words, this batch file is automatically running when you start your computer. Is that right?
I can't image a batch file that automatically copies eveything you view, such as web pages, Word documents, etc., into the clipboard. Is that what you want? And, if the batch file is automatically copying stuff to the clipboard, what do you do with it once it's in the clipboard? Is the batch file also suppose to automatically paste the clipboard content into some permanent file? If that's the case, then I would say that permanent file would grow astronomically and would not be very useful.
So, I still don't see any practical use of such a batch file. Can you, or anyone, enlighten me further?