Ive noticed a far few people have problems with WMP11 suddenly not working with there xbox 360 for streaming video music etc. Now ive found a solution that may help others. Its a DRM issue that stops your xbox from not finding your PC or being unable to connect. Heres the solution: Go to Security component upgrade (offical microsoft website) and click the upgrade button. If the upgrade button is greyed out, then use this link: http://www.netflix.com/pages/previews/resetdrm.exe and retry the microsoft site. Once the upgrade has completed, restart both your PC and xbox 360 and it should now find and connect to it. If you've added a shared folder, but your 360 cannot view or find it then heres the solution: Open WMP11 Click library Click add to library, then advanced options You should now be able to add your own folders. Add the ones that you have shared and click ok. You may need to restart your PC and the xbox for your 360 to find the new folders. Hope this helps people solve this problem, as it happens alot apparently and I couldnt work out how to solve it for a long time.