Windows 11 unwanted rapid down scrolling not fixed by factory reset or other troubleshooting

Question

I have uncontrolled downward scrolling of my Lenovo Thinkpad Nano. This happens in all programs (e.g. outlook, excel, and Chrome) every time I start the computer, and randomly at other times. Lenovo has replaced the keyboard and the trackpad, and the problem still occurs. I have done every troubleshooting thing I can find on this site and others, and it still occurs. When I start the PC, I can stop it from scrolling to row 50K+ in excel, for example, by pushing the windows key (not sure if this works all the time). These are some tho not all of the steps I have taken. Are there any other steps to solve this?

1.     updated all drivers (through Lenovo and other manufacturers sites) including mouse/keyboard,

2.      disabled touchpad

3.      uninstalled all the mice and HID and Standard PS/2 keyboards from Device Manager (with restarts and and re-updates) 

4.      unplugged everything (still happens when nothing  is attached to the laptop)

5.      ran cmd and hardware diagnositcs as admin (sfc /scannow, DISM /Online /Cleanup-Image /CheckHealth, DISM /Online /Cleanup-Image /ScanHealth, Dism /Online /Cleanup-Image /RestoreHealth)

1. Unconnected and reconnect mouse
2. Disabled mouse and tried trackpad
3. Replaced battery in mouse
4. Disabled trackpad and just used external mouse
5. Unplugged from power and all other devices
6. Replaced the mouse battery and check if the problem has disappeared.
7. Turned off mouse setting for controlling inactive window
8. disabled the laptop keyboard
9. Tried 2 different external keyboards
10. Disabled external keyboards
11. upgraded Win11 25H
12. Lenovo replaced the laptop keyboard and touch pad
13. Set computer back to factory reset

Answer 1

It sounds like you've already taken extensive troubleshooting steps to resolve the rapid downward scrolling issue on your Lenovo Thinkpad Nano. Given that you've replaced the keyboard and trackpad, and performed various diagnostics and updates, here are a few additional suggestions you might consider:

1. Check for Software Conflicts: Sometimes third-party software can interfere with input devices. Try booting your laptop in Safe Mode to see if the issue persists. If it doesn’t, a software conflict may be the cause.
2. Update BIOS/UEFI: Check if there’s a BIOS or UEFI firmware update available for your laptop model. Sometimes, firmware updates can resolve hardware compatibility issues.
3. Check Accessibility Settings: Ensure that any accessibility features that might affect input devices are turned off. Features like Sticky Keys or Filter Keys can sometimes cause unexpected behavior.
4. Test with a Live USB: If possible, create a bootable USB with a different operating system (like a Linux distribution) and boot from it. This can help determine if the issue is hardware-related or specific to Windows 11.
5. Contact Lenovo Support: Since you've already done a lot of troubleshooting, it might be worthwhile to reach out to Lenovo support again. They may have additional insights or solutions, especially if this is a known issue with your specific model.

If the issue persists after trying these suggestions, it may require more in-depth diagnostics from a professional technician.

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References:

• Resolved issues in Windows 11, version 25H2
• Active and retired troubleshooters for Windows 10 and Windows 11

Answer 2

See below for responses to the bot suggestions. This behavior starts every time I turn on the PC. Hitting the Windows key stops it, as far as I can tell. The keyboard was replaced so it's not a faulty key. Other ideas?

1. 1. Check for Software Conflicts: Sometimes third-party software can interfere with input devices. Try booting your laptop in Safe Mode to see if the issue persists. If it doesn’t, a software conflict may be the cause. This happened even prior to installing any software other than windows and office.
2. Update BIOS/UEFI: Check if there’s a BIOS or UEFI firmware update available for your laptop model. Sometimes, firmware updates can resolve hardware compatibility issues. Tried this--no change.
3. Check Accessibility Settings: Ensure that any accessibility features that might affect input devices are turned off. Features like Sticky Keys or Filter Keys can sometimes cause unexpected behavior. None of these turned on.
4. Test with a Live USB: If possible, create a bootable USB with a different operating system (like a Linux distribution) and boot from it. This can help determine if the issue is hardware-related or specific to Windows 11. Beyond my skill set.
5. Contact Lenovo Support: Since you've already done a lot of troubleshooting, it might be worthwhile to reach out to Lenovo support again. They may have additional insights or solutions, especially if this is a known issue with your specific model. Have already done this again. They feel it is a software issue.