Hello, My computer worked as a charm until two days ago. Win 8.1 Toshiba Satellite S50-B. A lot of apps (IE, firfox, chrome) keep crashing on me. When they crash, there is nothing I can do, CTRL ALT DEL does not work. A button appears to stop the application, it doesn't work either. Have to reboot each time. It is getting annoying. Computer is also slower all of a sudden. Scans (virus, MBAM, etc...) don't seem to finish, they just hang at some point. Just ruled out malware in another section of this forum. Any idea?