ESET NOD32 Antivirus is famous for its prominent ability in detecting Trojan and other sorts of online threats. And this Windows protection is based on the frequent upgrade of its databases. Each time you reboot your computer you will probably get new features when the program updates are applied to the currently installed version of ESET NOD32 Antivirus. But, some customers complain the upgrading process possibly failed to complete so that they have to end the auto-upgrading of ESET manually. What's more, there may also be some customers complaining ESET NOD32 Antivirus burning up too many system resources when they install it on an old PC.