Shortly after installing v3.0.621 I was unable to load PDF's from the internet. I clicked to open and as the PDF started to load it quit with an error. I could open PDF's on my hard drive with no problem. After checking every other possibility I uninstalled NOD 3.0.621 and sure enough that was it. So I'm back on v2.7 AGAIN. This time it's staying there for a looong time. If you're curious to see if you're afflicted, go to the ESET download page and try to open one of the PDF Manuals available right next to the download. If it opens good.