I have a Toshiba C75D-B7215 and since I upgraded to Windows 10, from 8.1, it is sooo sllloooww, especially when browsing (Google)!!! I have downloaded all the recent drivers and contacted Toshiba (THAT was a joke). I am seriously considering going back to 8.1 if I can't fix this issue, but I really like the features in 10.