

This blog helped me find who was the real culprit. At least this time, after some more googling, it shows the unknown space. Had no clue, thought of Viruses and Trojans tried everything I could do. I free up some space by deleting some movie files, and within hour those free spaces were filled. For the last two days my HDD free space is nearing to zero. I had to leave windirstat running for approx 9 hours seriously! I have a slowly expanding hard drive! No solution for it at this time.
