Almost all keyboards, cheap or costly, come with special keys including an Internet key. You can choose to make that key load another application instead of the browser. (The keyboard drivers often provide this capability, but sometimes they don’t.)

To change this, in the Registry Editor, go to
HKEY_LOCAL_MACHINE\ SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Appkey\7.

Create a new String Value by right-clicking in the right pane and selecting New > String Value. Enter the name as “ShellExecute”. Double-click on the newly-created String Value and enter the Value as the path of the file you want to run when you press the Internet Key. Click OK.