Idea of Start Menu Icon
The icon Start Menu starts with a horizontal rectangle on the bottom with a filled in circle to the left, inside. There is a wide vertical rectangle, with two vertical lines towards the top, sitting on top of the bottom rectangle, on the left side. There is a thinner vertical rectangle right next to the other vertical rectangle with a small line at the bottom.
This is a Start Menu icon. It is available in PNG and vector. Downloading is free for PNGs up to 100x100px.