How to install command and conquer

Since you don't have a video card, that means you are using some form of integrate graphics core. So you need to provide some info about your computer.

C&C games were released from 1995 - 2010 so there are several different games each with increasing video card requirements.

If you are referring to the most current version of the game; Command & Conquer 4: Tiberian Twilight, then it can be played on the Intel GMA 4500 graphics core at low resolution and low graphics quality.