taking off your battery is not good to your laptop,if your not lucky,you will corrupt your laptop and say goodbye to your harddisk of your laptop,avoid removing your battery.try to do system restore on your laptop.if you still have the same problem,most likely it is infected with virus and you have to reformat it.try to back up all of your important files NOW before something wrong happens on your laptop.consult an expert computer technician for your computer problem....have a nice day......