Software Update - WD SmartWare Windows Version 1.5.1.6 (8/16/11)

Exactly.  Being new to this forum I entered my comments in an effort to help others.  Running the CPU at 100% is a serious issue but no where near as serious as watching your C drive get eaten.  As I moved more and more files from my C drive to my e drive (trying to free up space) the temp files became even hungrier.  I guess more “analysis.”

When the C drive had zero free space programs began to crash and files became corrupted.  I lost a lot of time.

This is now a “Known issue.”  I can clearly and easily demonstrate this bug.  And yes, cleaning up temp files is programming 101.