I've deleted a document, it move to the recycle bin, I emptied the recycle bin. Is the document STILL retrievable someone in memory on my laptopFirstly, no the memory on you're laptop loses all INFORMATION once it is switched off, but the data will still be on your Hard Drive (that is where the data is stored, not memory).

Of course, you can 'Shred' files, this will remove them permanetly and they will be totally unrecoverable.
http://www.pcshredder.com/Quote

Is the document still retrievable someone in memory on my laptop

Is the document still retrievable someone in memory on my laptop

I think the question does not suffice his purpose. Permanent deletion or recover.
This one has both. http://www.piriform.com/recuva/features

I see now my solution will not work in this case. (I learn something new every day around here)
To test: I created a file in my documents, then created a restore point, then deleted that document (including recycle bin), then tried to recover that file via system restore. The deleted recycle bin file was not available after restore.

So I guess recovery software as you posted is the solution.