I downloaded a file using windows xp.. I couldn't open it, and choose WinRAR by mistake.. I think it needed "registry editor" to open it.. But I couldn't see this in the list to open programs.. What I'm hoping for now, is that someone can help me to undo what I did.. without using the "go back to another date feature" in XP. Really appreciate any advise!!! (Is it possible to place "Registry Editor" also in the list to open programs?