Here is a sample picture of the bad graphics that me and most others have been getting with Windows 7.
First go to your desktop screen. Right click anywhere on the screen. Go to 'new ->;' 'Text Document' and name it whatever with '.txt' file extension.
taskkill /f /IM explorer.exe
C:\"Program Files (x86)"\"Starcraft"\"StarCraft.exe"
Where the second line is the folder location of where you installed Starcraft. You will need to keep the quotation marks on that line as well for this to work.
my other tutorial here. If the file image did change to the one above, then double click the file and it will automatically load Starcraft with clean graphics.
NOTE: Some anti-virus programs may think your '.bat' file is a virus. Make this file an exception when doing a computer scan to avoid complications.