I am WinXP SP 2 etc -- and have BW on a laptop and a desktop.
Beginning a couple of versions ago, I will look, find, and install a version update--but when I go back afterwards, it says it needs the update, ie version installed is 'w' and version ready for download is 'w.'
I think it the flag gets set correctly on the second time through.
Am I the only one? <on two machines?>