Wipe free space - all partitions?

CCleaner for Windows
1

Hi,

I have a question about Wipe Free Space. If I just choose this option (without going into more advanced details) Cleaner will wipe all space (I mean all partitions, for example in my case disc C, D and E) or just main (system) partition?

Thanks for answer, have a nice day.

2

Have a read here :)

http://www.piriform.com/docs/ccleaner/using-ccleaner/wiping-free-disk-space

3

It will remember your drive selections - although you might not if you run it again at a later date. Therefore I'd recommend each time you plan to use it make sure you've selected or de-selected the drives you want it to run on.