In certain programs my touchpad is scrolling ridiculously fast with two finger scrolling, even at minimum scroll speed, but in other programs it is completely fine. The laptop is only a few months old but this has been a problem since I have got it. _ Windows MVP 2010-20 Millions helped via my tutorials and personally in forums for 12 years. I am using a Lenovo Z50 with Windows 8 and the touchpad software is an Elan Smart-pad.
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Standard Disclaimer: There are links to non-Microsoft websites. I will keep working with you until it's resolved. Feel free to ask back any questions and let us know how it goes. You can also use System Restore from within Windows or the above Repair Mode to get back before the problem began, then check for Updates with the Hide Update tool and hide them: to use the new Uninstall Updates button in Advanced Troubleshoot Options. You can also go into Repair Mode by whichever method works here. If this was caused by Windows Update(s) then you can check which were installed at Settings>Update & Security>Windows Update under Update History, then uninstall them from the link there, and immediately check for these again and hide with the Hide Updates tool explained here: This prevents palm drag from causing the cursor to jump The Touchpad software installs a tab onto it - usually the last one - that should have more settings to check, including a checkbox to Disable Touchpad when USB pointing device is attached. Then choose Additional Settings which opens the Mouse properties box. See if disabling any other setting will make the greyed-out Settings light up. Go to Settings > Devices > Touchpad to go over the Settings. If that doesn't work then try uninstalling driver, Restart PC using keyboard to Ctrl Alt Del, on blue screen tab to Power Icon in bottom right, press Enter, arrow down to Restart, press Enter to restart to reinstall the driver. If not try Update Driver > Browse > Let Me Pick to try all previously installed drivers. Choose Update Driver, then Automatic to see if it gets a better driver that resolves the problem. If that doesn't help then enter Device Manager reached by right clicking the Start button, go to Mice > Touchpad and then Driver tab. Make sure you also have the latest BIOS or UEFI firmware, Chipset, Display (Video), Sound, USB3, Bluetooth, Network and all other drivers, or else download and install the latest now.
Compare the latest drivers available for download with the ones presently installed in Device Manager reached by right clicking the Start Menu.
Update the Touchpad driver from the PC maker's Support Downloads web page, using the full model number, Serial Number or Dell Service Tag on sticker. I'm Greg, an installation specialist, 10 year Windows MVP, and Volunteer Moderator here to help you.