Luckily, I also have a PC!! I was working on it today - doing an assignment on word - and did a quick surf on the net. The internet explorer wasn't responding and the standard message about ending unresponsive program came up, so i clicked on end now. Nothing happened, the internet explorer window didn't close, so i thought i would restart. This was three hours ago and it is still logging off. Can't do anything - tried clicking mouse, cntl-alt-delete etc. Have tried turning off at switch - no good. So i have now unplugged it and am waiting for the battery to go flat in the hope that that will turn it off so i can turn it on again and continue on assignment which i stupidly have not backed up anywhere. Any other suggestions?