Druckman himself explained the name of the composition as follows:
The 'Windows' of the title are windows inward. They are points of light which appear as the thick orchestral textures part, allowing us to hear, fleetingly, moments out of time – memories, not of any music that ever existed before, but memories of memories, shadows of ghosts. The imagery is as though, having looked at an unpeopled wall of windows, one looks away and sees the afterimage of a face.[1]
Much of the work involves the use of aleatoric processes, similar to those associated with Witold Lutosławski. Windows was originally going to share a program with Claude Debussy's Jeux when it was premiered and Druckman wanted to pay homage to Debussy.[1]
A typical performance of the piece lasts about 20 minutes.
Instrumentation
The work is written for an orchestra with the following instrumentation.[2]