Recently upgraded from Windows 2000 to XP. Now I dont have the bits for my DVD-rom - error message says something about missing decoder software. Is this retrievable anywhere from the dark depths of my hard-drive (Ive got some sort of Recovery drive). It was originally included with my programmes when I purchased my computer. Or do I just have to go and purchase it?

DVD decoding software is included with your recovery disks or from your recovery drive. Please read your pc documentation for help with using the recovery software.