How to fix computer screen problem?

I'm having a screen resolution problem with Starcraft 2, on a Windows 7 computer, how do I fix it?

• Whenever I start the game, either from a copy directly on the computer or through an external hard drive, the screen alternates between grey, white, black, blue and multicolored screens. I can't select anything or open any in-game menus to change any video settings. I already reinstalled the game once. This is all I can see although the sound occasionally works. Your help would be much appreciated.

• Answer:

  does your system meet the minimum or recommended specs of the game, this will make a huge difference in the functionality of your games