**This is only if you have a pen that is connected to the pc VIA Bluetooth or something similar. If it is a simple touch device, nothing will help you.**
Open up device manager.
Look under either "Human Interface Devices" or "Display adapters". I am pretty sure it is under "Human Interface Devices" (i would be able to look and tell you for sure, but i did this to my laptop about 10/01/19
and then it got a Windows update and has a fatal boot failure.. NOT from this, just from MS crappy updates).
Under Human Interface Devices there should be something referring to the
touchscreen, make sure and any of the other drop down menus you can find something listed about your pen (while it is connected). Its not that big of a deal as long as you don't do the next step to the wrong thing.
Right click on the touch screen device and click "disable"
ONLY DISABLE! DON'T PRESS UNINSTALL! This just turns off the driver for the touch sensors so they can't communicate. Then try touching your screen with your finger, if nothing, then it worked!
Then try using your pen and if your pen works then Poof! done!
If not, then go back and re-enable that driver and try something else.