[[Drive wiper] Did not wipe all free space?]

I am using

- Windows 7 Home Premium 32-bit

-CCleaner v3.10.1525

- McAfee AntiVirus plus

 

I will look into the things you mentioned.

[[Drive wiper] Did not wipe all free space?]

Today I installed CCleaner and after using it to clear cookies and temp files (ie: regular cr@p), I decided to wipe the free space on my hard drive, the reason I downloaded CCleaner.

 

I went to:

Tools > Drive Wiper > Free space only/ Simple Overwrite (1 pass), selected (D:) and clicked Wipe.

 

My data (D:) has about 260GB of free space, so I expected quite a long time of overwriting.

 

However, at first the percentage bar was increasing rather rapidly, but the remainting time was also increasing (instead of decreasing).

 

After a while, it changed to: .....MB of 200MB. That number climbed until it was 200MB and then the wipe stopped.

 

 

What happened there? Why did it wipe only 200MB, and not all 260GB?