Sometimes when I sign in the Prevx icon is missing from the system tray and I have to reboot. This has been reported before but Prevx have not seen it in testing. Today I found the reason on my system (I think). Its a question of timing the run of Prevx and KIS 2010. When Prevx runs first the icon is shown and everything works. When KIS 2010 runs first Prevx doesn't show up. I hope I have fixed this by telling KIS to never scan the prevx.exe application. So far, this seems to be working for me. I would be interested to know if anyone else with this problem also is running KIS 2010.