This has been irritating me since upgrading to Win 10 from Win 8. The scroll on the mouse is too fast. One click of the scroll wheel takes me about a page down or up. It is not the windows settings they have all been set to the slowest options. I spoke to Microsoft Helpline; they diagnosed it as faulty hardware as when I swapped the mouse the problem went away. But since then the problem has quickly returned. I have found a fix but it is not very satisfactory. It is a wireless mouse that I am using. If the pages scroll too fast I disconnect the mouses USB dongle and put it into a different USB port; the problem then goes away until the next time the PC recovers from sleep or is rebooted. So this must be a software issue. I have uninstalled and re-installed the driver, indeed it occurs with different mice so it is not a driver issue. Any help or ideas please???