I don't need help with this, but hope someone will post some wisdom here on the topic for the beneift of others. Danged ESET site's been giving me grief - I filled out the form for a trial to get a client set up with ESS4, and never got a reply. (Waited 24 hours...) So, like an idiot, I went ahead and purchased it. Got the serial number, activated it, got the download credentials. Problem is, I couldn't download the software - the username and password wouldn't work. Of course, I couldn't get help from Customer Assistance on the weekend, so I couldn't get the work done. Wasted a bunch of time... Anyway, in a desperate grasp at anything that would get this installed, I tried the download with the same credentials on a system running XP. It worked fine. So, the computer on which I wanted to install this (a new system with 64-bit Windows 7) would not take the username and password, but my old XP machine would. Anybody want to weigh in on this?