Hi all. I have a problem, and I read others have had the same. I used the trial version of nod32, worked great for a long time, but a few days ago I restarted my computer and nod32 didn't start up. It froze on the splash, and after about 5 minutes I got an error message saying "error communicating with nod32 kernel serice". 2 days before this error I installed a software called PowerISO, used to convert between image file formats among other things. I suspected this might have been the cause of the error, since no other software installations had been made. This is what I did: Uninstalled PowerISO Rebooted the computer Removed the remaining folder of PowerISO Scanned through the registry for anything containing "powerISO" and deleted all the keys found Rebooted Uninstalled NOD32 trial Rebooted Removed the ESET folder, and scanned through registry for anything containing nod32 and removed all those keys Rebooted Downloaded a fresh copy of the nod32 trial version Installed it Rebooted Now, on the FIRST reboot directly after installation of nod32, it worked and updates virus definitions as before this error occured. However, I rebooted after the definitions had updated, just to make sure, and on this second reboot nod32 just froze, like earlier, displaying the same warning message after about 5 minutes. So what can I do? I consider my "cleansing" of both nod32 and the (possible) software that messed up nod32 quite good. I was really enjoying the simplicity and speed of nod32, but if it crashes on other (popular) software installs, and won't revive after a FULL un/re-install, I'm just not sure anymore. Help appreciated, /project6 Edit: During installation I shut down every process possible, and my WebClient service is disabled. Edit 2: Problem solved. The nod32 kernel service was set to "inactive", thus stopped, in services. It's my belief that PowerISO caused this somehow, cause I sure haven't been fiddling in services.msc! I put it back to "automatic" , started it up, and voila: nod32 back and ticking.