text: Well u may have to many programs running at same time, you may not have enough memory to run them, or you h ave been infected by a viruses or malicious spyware...IF you have any problems in these areas, you can go to a free website called pcpitstop.com and they can run free diagnostics online without harming ur computer and tell you where the problems are at and give some insight as to fix them also...very kewl website