How do I start the on-screen-keyboard during the windows installation process? I need to install Windows 7 and I don't have keyboard, I only have a mouse.
The first phase of the install will not require the keyboard. You should be able to go mouse only all the way until it prompts you to enter a new username and password.
Once you get there click the button in the bottom left corner (highlighted in yellow in the above screen shot) that will bring up the "Ease of Access" menu
Check the box for "Type Without the keyboard". Once you click OK it will enable the On-Screen Keyboard