You should check if your computer detects your touchpad at all. You should look into mouse and touchpad settings then select hardware.
1. If your touchpad isnt detected at all you should try cleaning the connections of your touchpad to your computers motherboard. (This solved my problem) Even if it doesn't look dirty it might have a few specks of dust, especially if you have been opening your computer. I used a toothbrush and contact cleaner. You can also try to tape down the connection to ensure that it is connected.
2. If your touchpad is detected then you should try installing drivers and MAKE SURE YOUR TOUCHPAD IS ENABLED in settings. Some computers have buttons near the touchpad area to disable to touchpad as well.