The cursor is frozen. The Synaptics touchpad — two-finger scroll, pinch zoom, all of it — stopped responding, and Device Manager either shows it with a yellow warning or does not show it at all. The keyboard works, a USB mouse works, but the touchpad might as well not exist.
Synaptics touchpads on Windows 10 fail in a characteristic way: Windows Update replaces the Synaptics SMBus driver with a generic PS/2 driver that cannot speak the touchpad’s protocol. The hardware is fine; the software binding is wrong. The repair is to get the correct Synaptics driver bound again — rollback, clean reinstall, vendor package — in that order. (For the Windows 11 variant of this problem, see our Synaptics on Windows 11 guide .)
Why this happens
- Update replaced the Synaptics driver. A generic Microsoft PS/2 driver took over and cannot use the SMBus interface.
- Synaptics SMBus driver corrupted. The update damaged the driver mid-install, leaving it unable to start.
- Touchpad disabled in Settings. The update flipped the touchpad toggle off under Devices settings.
- Fn-key touchpad toggle engaged. The function-key shortcut disabled the touchpad at the firmware level.
- Old Synaptics app conflicting. Leftover Synaptics control-panel software blocks the new driver.
- SMBus controller driver broken. The underlying bus driver the touchpad depends on is damaged.
- BIOS touchpad setting changed. Firmware updates can disable the internal pointing device.
- Embedded controller wedged. The EC bridging the touchpad needs a power-drain reset.
How to fix it
Work through these in order — diagnose first, then act.
Fix 1: Check the touchpad toggle and Fn key
Go to Settings > Devices > Touchpad and confirm the toggle is On. Windows 10 updates occasionally flip this off. Then try the function-key toggle — commonly Fn + F5, Fn + F7, or Fn + F9 depending on brand; look for the touchpad icon on the key. Press it once and test. If the cursor returns, the touchpad was simply disabled, not broken. Check both before touching drivers — this thirty-second check resolves a real share of cases.
Fix 2: Roll back the Synaptics driver
Open Device Manager, expand Human Interface Devices (or Mice and other pointing devices), and find the Synaptics entry — it may be named Synaptics SMBus TouchPad, Synaptics Pointing Device, or similar. Right-click, open Properties > Driver, and click Roll Back Driver if available. Restart. Rollback restores the last working Synaptics build in about a minute and is the fastest fix when the failure followed an update. If the button is greyed out, the update did a full replacement — continue to the clean reinstall.
Fix 3: Clean-reinstall the touchpad driver
Right-click the Synaptics entry and choose Uninstall device, checking Delete the driver software for this device if offered. Then click Action > Scan for hardware changes. Windows redetects the touchpad and installs a driver. Restart and test. If Windows installs the same broken generic driver, do not stop here — the vendor package in the next step is the real fix. The clean reinstall matters because it purges the corrupted driver package from the driver store.
Fix 4: Install the manufacturer’s Synaptics package
Go to your laptop maker’s support site — Lenovo support , Dell support , or HP support — find your exact model, and download the Synaptics touchpad driver for Windows 10. Install and restart. Vendor packages include the correct SMBus driver plus the Synaptics control panel for gesture configuration. This is the definitive fix for update-broken Synaptics touchpads: the vendor driver registers properly with Windows Update and resists being overwritten by generic drivers. Lenovo owners can follow the model-specific notes in our Synaptics guide for Lenovo laptops , which covers ThinkPad and IdeaPad driver quirks. After installing, give the touchpad a full test — movement, scrolling, and gestures — before calling it fixed.
Fix 5: Remove old Synaptics software
Leftover Synaptics apps from before the update can block the new driver. Open Settings > Apps, search for Synaptics, and uninstall the old Synaptics pointing device software. Restart, then reinstall the vendor package from Fix 4. This two-step clears stale registry entries and startup services that commonly wedge after feature updates. Only do the removal immediately before the fresh install — you do not want to be left with no touchpad driver at all.
Fix 6: Check the SMBus controller and BIOS
In Device Manager, expand System devices and look for the SMBus controller (Intel or AMD). If it shows a warning, update or reinstall the chipset driver from your laptop maker’s site — the touchpad cannot work if its bus is broken. Then restart into the BIOS (F2, Del, or your brand’s key) and verify the Internal Pointing Device is enabled. Some firmware updates disable it. Save, exit, and retest. A touchpad missing from Device Manager entirely after all driver fixes points to this BIOS setting.
Fix 7: Power-drain reset and hardware check
Shut down completely, unplug the charger, remove the battery if possible, and hold the power button for 30 seconds. Reconnect and boot. This resets the embedded controller that bridges the touchpad. Test the touchpad in the BIOS menus too — if it works there but never in Windows despite the vendor driver, a deeper Windows issue (consider an in-place repair install) is at play. If it works nowhere, the touchpad hardware or its ribbon cable has failed and needs service.
Closing
Synaptics touchpad failures on Windows 10 are driver-binding problems in the large majority of cases: the wrong driver got installed, and the right one needs to be put back. Check the toggle, roll back, clean-reinstall, then install the vendor’s Synaptics package. Keep a USB mouse in the laptop bag — it makes touchpad outages a minor annoyance instead of a work stoppage, and it is the tool you will reach for first during any future touchpad repair.
