Download AutoHotKey and hit download
2. You can download the Current version
3. Run it on your computer.
4. Open NotePad
5. Type " Key you want to use::Key function to replace with".
6. Sample- I want to change my F4 key to work as my Escape key.I will simply type, F4::Esc.
7. Save the notepad file as "filename.ahk".
8. Make sure you know where the particular file is being saved.
9. Run the saved ahk file
10. Congrats, your key has been replaced.