Here are my favorite set of windows 7 black themes which you can download and change windows 7 themes by just clicking it.
The list has right from Dynamic Black to VS 2010 Black to Black Glass and lot more themes. Click on the images to download the themes for free. Please look for download link on left of the page after you click on the image below.
Only Black Windows 7 Theme
VS 2010 Black Theme
Warsaw Windows 7 Black Theme
Windows 7 Ultimate Black Theme
nautiKK Black Theme
Black Glass Theme for Windows 7
Windows Se7en Black Theme
Black Horizon Xtreme Windows 7
If you have any black theme other than these, just let us know in comments and we will showcase that particular black theme with your name!!