Hi, I am using XP Pro (NTFS) and have encountered a rather peculiar problem. Every so often 90% of my screen will go blank; actually it turns into standard Microsoft grey/beige. A thin strip at the top remains visible and right clicking on that strip still works. The blank portion is totally dead. A file then appears on the taskbar with no name and which is impossible to close. If I click on restore desktop then the desktop reappers but the mystery file remains and clicking on it brings back the blank desktop. It is as if somehow my desktop has been bundled into a file and then locked away. Anbody got any ideas what is happening and why. I can't belive I am the only one to have experienced this problem.