Erratic touchpad behavior can often be attributed to outdated or corrupt drivers, hardware issues, or interference from external devices. To troubleshoot, start by updating your touchpad drivers through Device Manager or your laptop manufacturer's website. If the problem persists, try adjusting the touchpad sensitivity settings in Windows Settings to see if this reduces unintended cursor movements. Cleaning the touchpad surface with a soft, dry cloth can also help remove any dust or debris that might be affecting its performance. For persistent issues, consider performing a system restore to a point when the touchpad was functioning properly, or consult with a professional technician to rule out hardware problems.