When using my Sony vgn-sz1xp/c the s-button menu keeps popping up as if it's been activated. I have tried changing the settings, but it keeps happening - very annoying when presenting! Battery seems to charge and run normally. I did try taking out the battery and running it which seemed to cure it - but I only did this for a little while and the problem is random (might get an hour with nothing, then 15 minutes constantly popping up.