Secure disk eraser doesn't work

Hi,

I've tried CCleaner secure disk eraser on a hard disk of my office desktop computer, and on a USB key on my laptop : neither work !

I wait for something to happen, but the progress bar appears and stay at 0% for several hours.

What are the Operating Systems ?

Has I.T. Administration protected office computers from being erased ?

What HDD are you erasing in the office - the one with Windows ?

What sort of Flash Drive.

What are the Operating Systems ?

Has I.T. Administration protected office computers from being erased ?

What HDD are you erasing in the office - the one with Windows ?

What sort of Flash Drive.

1 - Desktop (I wrote "Office Computer", sorry it's a bad translation, it's my personal desktop computer) :

windows 7 home edition

full administrator

SATA data disk (physically different from the one with Windows), no protection

2 - Laptop (professional computer) :

Windows XP SP3

local administrator

standard USB key, no protection

Just to be sure, are you trying to erase free space only or the entire contents of the disk.

NB I have no experience of either - just clarifying the problem for those with experience.