make sure you click the 'set' button when you change the pagefile, otherwise it will not stay changed. If that doesn't help, go to Administrative Tools-Event Viewer and in the applications log and the system log, have a look and see if there are red buttoned messages entered for that session. If so click on the messages and see what application or module is causing problems. That might give you a clue. Certain apps can do this. One was an Intel one I recall, but there are others.