So it isn't a Windows issue
I'm glad you solved the problem.
I want to add a word of encouragement here: In out group we have
been co-writing papers and documents using LyX on Windows/Linux/OSX
- There never, ever has been a problem with LyX itself.
- Only occasionally (2 or 3 times) we had compatibility issues with
different versions of one of the supporting tools. Usually,
different versions of ImageMagik were the cause.
Overall, I can truly recommend LyX as a cross-plattform document
Thanks, that is good to know.