I have windows xp. a week ago i tried to IM someone on yahoo. i could see what i was typing until i hit send, then nothing shows up. when someone answers me nothing shows in box. my ex bf has been messing around on my computer so i tried going into user accounts to CHANGE password so he couldn't get in. when user account box opens, you can't see anything inside the box. same for system restore. i tried to open it to restore point, thinking maybe he had done something. box opens but nothing inside. zip, nada, nothing, just an EMPTY box. what's up with that and how do i fix it please?I think your system is missing some important files and systems. You may want to back up PERSONAL files you want to keep on a external hard drive and then do a new install of windows.

On the new system gain control of the admin account and password it. Make others make their own log ins through user accounts in the control panel. or have them use a guest account to log in.

You could always try a recovery or a roll back but I think you will be more happy with a new install. ITs just like the 1st day when you get a new computer..fast and reliable and uncluttered.