Jabran,

Can you correct the link to the download? It doesn't work properly.
Meanwhile I'll investigate your question about the sparkles.

EDIT
See this post.
See this post and the one following it as well.

Reading through what is mentioned on the forum, I suggest that you try:
1 - to switch the sparkling furniture to Matt or Unchanged and render again to see if that takes the sparkling away.
2 - to set the ceiling to Visible, or if there is no ceiling, to draw a room with visible ceiling.
3 - to apply a texture to the sky to avoid direct sunlight.

Not having your file, I can't help you further by testing it.

Hans