Start button, Start menu

Capitalize references to the Start menu and the Start button on the Windows taskbar. Don't use bold formatting for Start unless you're referring to the menu or button in instructions.

Don't refer to the Start button as the Windows Start button.

Don't include the word button unless it's necessary for clarity. If you do, button is lowercase.

If possible, to help customers locate the button, include the Start graphic in references to the Start button.

Example
You'll find the Start button on the taskbar.