On Screen Keyboard
You can simply take advantage of On screen Keyboard utility provided by Microsoft to type without using keyboard. It will bring a keyboard on your desktop and you can use your mouse pointer to click to type any key.
How to get it?
1. Use Win+R key to get Run dialog box
2. Write "OSK" and press enter.
3. Your Onscreen Keyboard is at your service.
Alternatively you can find the same in
"StartMenu->All Programs->Accessories->Ease of Access->On screen Keyboard".