To ensure compatibility, download the driver specifically for your laptop model: Acer Laptops Acer Support - Drivers and Manuals page and enter your Serial Number to find the exact match Aspire ES1-531
Synaptics periodically releases firmware and driver updates to patch vulnerabilities, such as potential kernel memory leaks. synaptics tmp 2970 driver link
If you are seeing a "yellow triangle" warning in your Device Manager or your touchpad has stopped responding after a Windows update: To ensure compatibility
site provides the necessary Synaptics SMBus drivers required for proper touch functionality HP Support Community Installation Instructions synaptics tmp 2970 driver link
Here are the official sources. Do use any link from a pop-up ad or a "driver updater" software.