Exit from all programs, including any media player. Does the problem still exist?
If yes, temporarily turn off your anti-virus software. Problem still exist?
If yes, then if possible, use another keyboard and see if the problem vanishes.
What operating system are you using, for example, Vista Ultimate, XP Professional, etc.?
karl
I have suddenly found that the cursor moves back in the middle of words and I
don't know how to fix it
