NDP451-KB2859818-Web.exe If anyone knows exactly what this is I would appreciate the sharing of your knowledge. It and the "set-up" of it just showed up in my downloads folder. It calls itself "Speed Up My PC", smells like a highjacker to me. A web search gives mixed messages. Some sites claim it was developed by Microsoft and the façade looks legit.I can't seem to nail it down. I'm having symptoms of some letters being scrambled.as I type. I don't know if it's related. With so many new things in Windows 10 I'm not sure what Microsoft is throwing at me.