The following advice may be helpful for users of the Web.Developer Server Suite and others testing their sites through Windows and on their own server:
If you find yourself facing the "White Screen of Death" (a Drupal page that loads with nothing, just a white screen), you can visit a page that solves most folks' problems here: http://drupal.org/node/158043. But if you find that EVERY NODE YOU HAVE is blank, chances are Apache simply isn't running.
Chances are you're testing your site through a service like Web.Developer. If that's the case, confirm this by opening your Web.Developer Controller (WDController.exe, likely in C:\www) and trying to run Apache. If you get Error, make sure your port is open. Perhaps you're running Skype in the background, in which case you shut it down totally, restart Apache in WDController, and now since the Port has been freed up, you can use Web.Developer (you can also now happily restart Skype as well).