But with a second reconfigure, I have now three PDF (dvipdfm, pdflatek, ps2pdf) that all work! And I have a new View HTML; but this one doesn't work because htlatex doesn't understand paths with space and the temp directory is by default in the "c:/Document and Settings/bla bla bla" directory. This is an old bug that we should solve someday.
A second reconfigure? To replace '%%' by 'auto', you will need one reconfigre followed by a restart. I guess you did not restart lyx after re-configure? For a fresh lyx, of course, the initial configure will set 'auto's correctly. If you do not like html menu, you can set its format to empty. This is why I introduce 'auto' rather than simply replying on an empty viewer entry. Bo