I'm using a Win XP Pro SP3 system, AMD Sempron 3000, 1.8GHz. I see ekrn.exe running at or near 100% CPU for 4-5 minutes as the system starts up. Once this has stopped I have no complaints about NOD32, but it's really annoying me. I don't want to turn it off completely but would like to know why it takes so long to do whatever it is doing. I've looked at various threads here, eg one that suggests that editing the profile for the system startup on-demand scan allows me to tailor what is done by this scan. (It doesn't seem to me that calling the system startup scan an 'on-demand' one is intuitive.) Anyway, when I look at the setup info for 'on-demand' scans there isn't an existing profile for system startup. The only profiles provided are for: In-depth scan Context menu scan Smart scan I presume the first of these is parameters for what you get when, using the provided GUI, you start a in-depth scan of your whole machine. And the second is obviously used for Windows Explorer's right-click context menu. According to 'help', "Smart scan" is for GUI-initiated simple scans - so it's not system startups either. So, is there a way to configure what's being done by the system startup scan?