Exclude ESET from detection on your third-party firewall (such as Norton Personal Firewall, ZoneAlarm, or others). If you are using the ESET firewall and have no other firewall software installed, disregard this step.
If you do not use HTTP proxy for downloading updates, verify update settings properly:
Open the main program window and press F5 to access the Advanced setup window.
Click Update, expand Profiles → Updates → Connection Options, select Do not use proxy server from the Proxy mode drop-down menu, and then click OK.(Version 8.x and earlier: expand Update and then click Update → Setup, click the HTTP Proxy tab, make sure that Do not use proxy server is selected, and then click OK).
Business Users only:
If your settings in HTTP Proxy are locked (read only) then this proxy policy was forced by ESET Security Management Center or ESET Remote Administrator.