Many users who own a laptop or a tablet with a trackpad prefer using an external mouse. The use of this external mouse is undertaken because it boosts their productivity. Users are more comfortable and used to the usage of this external, standard sized mouse that it is just robust and helps these users to do more. So, in older versions of Windows 10, there used to be an option in Touchpad settings inside of the Settings app where a user can check or uncheck the checkbox that says Leave touch pad on when a mouse is connected. So, if you wish to disable the touchpad when an external mouse or pointing device is connected. But, as noted in Windows 10 1803 this option is no longer available.
So, if you are on Windows 10 1803 or Windows 8/7, we are going to discuss some method by which you can disable Touchpad when an external mouse is attached.
Disable Touchpad when external mouse is attached
1: Using Mouse properties in Control Panel
In the Cortana search box, search for Control Panel. Click on the relevant search output.
Once the Control Panel is opened, click on the icon that says Hardware and Sound.
Under the menu that says Devices and Printers, click on Mouse.
This will now open a new small window. In it menu tabs, select the one with an entry for ELAN or Synaptics.
Now, in the whole list of the options, uncheck the option that says Disable internal pointing device when external USB pointing device is attached.
Click on Apply and then OK for the changes to take effect.
2: Disable Touchpad when Mouse is connected using Registry
Press WINKEY + R to run the Run window. Inside that, type regedit and hit Enter.
Or, in the Cortana search box, search for regedit and hit Enter.
This will now open the Registry Editor on your device.
Now, navigate to the following registry key:
After this, right click on SynTPEnh and then hover over New and then click on DWORD (32-bit) Value.
Name this new DWORD as DisableIntPDFeature and double-click on it in order to change its value.
Select the Base as Hexadecimal and set the Value Data as 33.
Hit OK to save the changes and reboot the computer for your changes to take effect.
3: Disable touchpad when an external mouse or pointing device is connected to Windows 8.1
Press the WINKEY + C button combinations to open the Settings Charm and select Change PC settings or just press WINKEY + I to open the settings app.
Then click on the menu that is labeled as PC and devices.
Now, click on Mouse and Touchpad menu in the left slide menu.
On the right side menu panel, look out for an option that says Leave touchpad on when a mouse is connected.
Turn that option Off.
Reboot your PC for the changes to take effect.
Hope this helps!
Read next: How to Reset Touchpad settings to default in Windows 10.