I have been a longtime customer of Eset's NOD32 Antivirus product. Although version 2 had an overly complex and poorly translated interface, it was unrivaled in terms of speed, resource usage, and detection rates. It also was one of the earliest AV products to support 64-bit operating systems. Version 3 retained the assets that made version 2 excellent and changed the interface to be much more intuitive and attractive. With version 4, Eset seems to have taken many steps backward. The product has unneccessary feature bloat. For instance it tells me when there are Windows updates available that I have not installed. Thanks Eset, but Windows already is telling me the same thing! Plus it nags you to install optional updates as well as the recommended ones and I hate that. It has a new feature called SysRescue which is interesting in that it is a bootable CD that allows you to scan the computer offline, while rootkits cannot hide virus-related files and registry keys. However I can never get it to work. It always locks up between 60% and 70% of the way through the scanning process. THe worst part about version 4 is that the scanning engine hangs all the time. It will show that it is scanning the same file for days or weeks if you let it. I've tried putting in support requests for this, but all they do is refer me to an article they have that does not solve the issue. That is after I wait several days for a response of any kind. Sometimes I don't even get a response. It is atrocious. I used to be gung-ho about Eset's AV product, even taking steps at the consulting firm I work for to get us to become a resller of their products. But in the end it looks like the program is simply not worth deployment because it causes more headaches than it prevents.