On reinstalling ESS 4.2.40 I find I get the above error message, which seems to be a common complaint on this forum. I have tried deleting the suggested folders (the only one I found was the ESET folder in my personal Application folder). I also made sure ESET Firewall wasn't seen in Local Network Properties (it wasn't). What I have not done is the manual uninstall of ESS in Safe Mode because that utility says that can cause harm to my system. Is that all I can do at this point? I'm considering just getting ESET without the Internet Security, as I don't use Spam controls outside what my email provider offers, and I can just use the XP built-in Firewall. Running ESS 4.2.40 on XP SP 3.