Since no information was offered about what OS, make/model and any prior history and in fact you neglected this TIP that appears with every post "If you are asking for help to troubleshoot a computer-related problem, please be sure to include all the necessary information (ie: operating system, model number, hardware, software, etc) that will help others identify your problem for a speedy resolution."

All I can offer is that you try a NEW POSTING in the OS Forum that matches with all the missing information.