Thanks - appreciate the responses. The paint.net software installed on my XP machine but when I attempted to run it I got a message that use of paint.net required that Microsoft's .NET framework be installed. Went to the Microsoft site and (thought I) downloaded that, but on running that file it attempted to connect to Microsoft for further downloads, and (not being connected to the internet) never did install. Guess I'll have to look elsewhere for a complete copy of .NET framework to install...