NOD32 18.104.22.168 Database 7609 20121020 Win XP SP3 Since yesterday evening (about 12 hours ago), virus signature update starts but runs continuously without ever completing or downloading anything. The system tray icon is rotating without stopping. CPU usage for EKRN.exe is stuck at 50% - it is a hyperthreading Pentium 4 Prescott so 50% is one core. If I open the NOD32 GUI and go into Update, it is at 0% and the update icon is rotating. Pressing "abort" does not do anything. The only way of stopping the update (which is set for "repeatedly" at 120mins) is to restart the PC - but update immediately starts again and gets stuck. I have not changed any settings at all. Connection to the internet is working properly - I am using the same connection to make this post. I have not suddenly started using a proxy or anything. As I say, I have not changed anything. So now, in order to be able to continue using the PC, I have just changed the update schedule to daily at 0800. This stops NOD32 attempting to update until that time tomorrow and allows me to work and gives some time for someone to check if there is an update server problem. Is anybody aware of a problem? Additional info added 3 hours later: I think I may have to uninstall and reinstall NOD32. It is now stopping me downloading any zip files. Left clicking a zip link in Firefox or Chrome just sticks the browser at "loading" and EKRN.exe goes to 50% CPU. Right click and save sets EKRN.exe to 50% CPU and nothing else happens. If I disable protection, I can download the zip with no problem. But I notice other threads about EKRN.exe CPU so I might wait a bit as I have some work to do and cannot spend half a day uninstalling and reinstalling right now.