I was browsing the idlebrain.com website (it is a website about indian movie news and reviews). NOD32 gave alerts and quarantined "TrojanDownloader.Agent.OOL" and "BHO.NKU" trojans. All the icons on the desktop and my taskbar disappeared. When I checked the processes running, "explorer.exe" was not running anymore. When I restarted the explorer manually, the icons keep appearing and disappearing all the time. I ran a quick scan using "Malwarebytes" and it found and cleaned 13 infections. This solved the problem with my explorer too. May be someone at ESET should do some guerrilla testing by visiting idlebrain.com and see how many trojans are missed by NOD32. To be honest, I didn't run a full scan by NOD32 before running Malwarebytes. But, I thought NOD32 with such good proactive ratings, would be able to pick it up and clean it. Also, I haven't tried the proactive version of Malwarebytes(not free) yet. Oh, BTW NOD32 is running at default security level (I didn't modify any of the settings). EDIT: Sorry for not providing the full list of infections detected by Malwarebytes AntiMalware earlier. Here it is from the logs http://i40.tinypic.com/xm357c.jpg PS: I am an ex-Norton customer trying out the NOD32 V4 beta after reading reviews at av-comparatives.org and newegg.com.