First check to see if your PC configuration is up to the minimum requirement by going to My Computer on the desktop right click and select Properties. If required upgrade your PC to match with the minimum configuration. * Pentium Class 300 MHz processor or better (1 GHz recommended) * Windows? XP (SP1 or above) * 128 MB RAM * 500 MB hard drive space * Video display card * Sound card * Microsoft Internet Explorer 6.0 with SP1 required for use of Music Store, Radio or On Demand services Important: Windows XP service pack 1 operating system is required to use this product. Service packs can be downloaded from here. Please also make sure that you have the administrator rights for the PC. Then check if you have the version of Windows Media Player bundled in the CD ROM installed. If in doubt un-install your existing versions of Windows Media Player and Philips Plug-in and then install again from the installation CD (for USA both CD1 and CD2) or from the support website.