I have had this problem on many Windows machines since Windows XP, and I have never figured out how to make it go away. It's pretty simple to reproduce for me:
- Open MSWord, Windows Live Mail, Thunderbird - pretty much any editing application
- Create a new document/message
- As fast as you can, type hey [space] you [space]
- The computer will either Beep, or in the case of MSWord or T-Bird, bring up a modal spell-check window, and when dismissing the dialog, places the cursor in a new position in the document.
Does anyone have any idea what is going on, and how to make this annoying behavior stop?