OS XP on wife's PC and this has shown up in the past two months. In any application (email, Word, web, etc) whenever you start typing the cursor disappears and the frame around the window you are typing in fades out so you cannot type anymore until you click back on the spot. Can only type a letter or two before it happens again. I have run virus scan and spy ware scans, also HD diagnostics, defrag, etc and no problems. Also checked the setting for "hide cursor while typing".
Thanks if someone can help because I do not like sharing my PC with her. Anything else but that!