[KB2692] How do I enter or change my username and password in ESET ... Open the main program window by clicking the ESET icon in the notification area, or by clicking Applications → System Tools → ESET NOD32 Antivirus. In the main program window, click Update → Username and Password setup. Figure 1-1. Verify that your username and password are entered correctly and click OK. The following is an EXAMPLE only: