From the Desktop of my XP Home Edn SP3 system, under the Right-Click Menu > Properties, the [Desktop] tab, of the 'Display Properties' window shows a selection list for the Desktop's Background image. For me this list has become frozen and its slider (at right) will not move. The [Browse] button and the 'Position' dropdown list (whether the selected image is centred, stretched, etc) are also greyed out. I can still use both the Color dropdown list at the right of the Background list and the [Customize Desktop] button below it, and make any changes as desired. What's gone wrong. I'm guessing maybe a registery setting or I've deleted a file somewhere, but haven't found the cause as yet. Any suggestions?? Thanks.