Hi Saab Dastard - I always smile at that name! Madame does no P2P - well, not knowingly, anyway. In any event, I don't see how my running Malwarebytes, Spybot, CrapCleaner and Defraggler one time each in her absence is likely to clear out half of the content of her hard disc, assuming that this content is "normal" content. Each time it has happened, the numbers have been more or less the same; It has used space in the seventies of Gb at first and ends up down in the high thirties or low forties of Gb. When you consider that there's a lot of space permanently filled with software, it means that the space filled with data drops to around a half each time.
She doesn't have extra memory, only a total of 1Gb, as I mentioned earlier. That would appear to put the kibosh on the swap file being the explanation unless it fails to clear the stuff swapped onto the hard disc each session so that it accumulates. Is that possible? Then would Crapcleaner clear it all out once a month or so, when I get my hands on it?