If you're having trouble with your touch screen on Windows 10, it could be because of a hardware or driver issue. Here are some troubleshooting tips to help you get it working again.
First, make sure that there's nothing obstructing the touch screen, like a protective case or screen protector. If there is, remove it and see if that fixes the problem.
Next, try updating your touch screen driver. You can do this through Device Manager. Just find the device under Human Interface Devices, right-click on it, and select Update Driver. If there's no updated driver available, you may need to contact the manufacturer of your device for further assistance.
If those steps don't work, you may need to perform a clean installation of Windows 10. This will erase all your files and settings, so be sure to back up everything first! But if you're still having trouble with your touch screen after doing all of that, then a clean install may be your best bet.