2002 Dec 10 is the latest version you can download for litestep, goto http://www.beyondconvention.net/ohussain/installer_downloads.shtml, uninstall your current LiteStep, and install the new one, it worked fine for me and I had the same problem. Got rid of NAV too and changed for BitDefender. Don't know which of these switches made the deal, but it did... Good luck :)