FAQs What is the difference between 32-bit and 64-bit versions of Eset NOD32 and which one do I need? How do I upgrade my NOD32 program to the latest version? My username and password don't work. How can I fix it? How do I renew my Eset NOD32 license? How do I enter or update my Eset NOD32 Username and Password? What is the difference between an Eset NOD32 renewal license and a new license and which one do I purchase?