On an XP system, if you open Wordpad and Notepad, and type some text into Notepad, then press Control-A to select all of it, then press Control-C to copy it, then close Notepad without saving the text, you should still be able to select Wordpad and press Control-V and get the text to paste into Wordpad. If this doesn't work on your XP system, you have a problem with the Clipboard functionality.