You can remove an area using the Garbage Mattes and, if the background were a solid color, you could use Chroma Key or Videomerge to make it transparent.
But in this case, because you need to remove several squares and keep the window frames, I'd recommend you save it this image as a still photo and remove the window pains from it. You can then use the photo, without a background in your video and even animate motion paths over it.
But there is no simple way in Premiere Elements to just remove several areas of a video.
Thanks for the reply Steve.
I know I could simply create an image and add white squares in each frame. The problem would come in having the blind move over the squares and window frames etc. In photoshop obviously the main layer would be on top, not got a clue how it can be done in Premiere though. Essentially slicing the image into two seperate parts.
That would probably not be possible to do in Premiere Elements. Sorry.