Check the box that says "Delete the driver software for this device" if prompted, and confirm.
By following these steps, you should be able to eliminate the error and restore full functionality to your touchpad. If the steps above did not work, let me know: What is your laptop brand and model? Did this happen after a specific update? Is your touchpad still working despite the error? synaptics.exe bad image windows 7
This is the most important step. The SFC tool scans for missing or corrupted Windows files and repairs them automatically. Check the box that says "Delete the driver