My laptop running XP SP3 sometimes goes non-responsive to mouse or keyboard and desktop display changes to just displaying Express Media Player. What is this? I have to power off and re-start to get control back to normal Windows desktop. I'm not very computer savvy so I don' understand what is causing this. Appreciate any help to resolve this. Found out what this! It is Toshiba's pre-loaded SW for playing CDs/DVDs without starting Windows XP. Not sure how it got started on this laptop, perhaps someone(?) pushed wrong button, etc. Whatever, the procedure to stop it and restart Windows is by power off/on so I'm cool with this.