Is it an optical mouse?<br><br>I see this all the time with my mouse if I'm using a particular mouse pad or surface. Some surfaces will cause an incorrect reflection and the mouse ends up somewhere else. I know it to be the case, because if I switch to a different surface or mousepad the problem goes away (and vice-versa).<br><br>edit: oh, you said "with no input given". Should have read your post first <br> <P ID="edit"><FONT SIZE=-1><EM>Edited by Trog on 10/20/03 03:21 AM (server time).</EM></FONT></P>