The volume (C:) was not optimized because an error was encountered: The parameter is incorrect. (0x80070057)

[Elma__]

I always get this error after trying to defrag and optimize my Local Disc C partition.
It was at first stucing at pass 1, I noticed I have just few GBs space, and I free up 100GB, now it is doing many passes like 7, but at end it will show:"Needs Optimization (Fragmented 39%), precents are sometimes different.

What does this mean?
Is there soemthing wrong with my hardware, software, or it is normal?

 

[Colif]

the second post here might help: http://answers.microsoft.com/en-us/windows/forum/windows_8-performance/optimize-drives-the-parameter-is-incorrect/4d4360e7-37a8-4811-aefd-3d1e8a23b261?page=1