There are a few things that you can try to fix this problem. The first thing is to update your touchpad driver, as this is often the cause of the problem. If updating the driver doesn't work, then check your touchpad settings to make sure they're enabled. You can also try rolling back to an earlier version of the driver or uninstalling and reinstalling the touchpad driver. If none of these solutions work, then it's likely that there is a hardware issue with your touchpad