By default, ESET Smart Security and ESET NOD32 Antivirus check for virus signature updates every hour. In cases where limited network resources or bandwidth necessitate less frequent updates, this setting can be changed. Changes to the timing of virus signature updates are made through the Scheduler/Planner module. To access the Scheduler, follow the steps below:
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Open the main program window by clicking the icon
in your Windows notification area or by clicking Start → All Programs → ESET→ ESET Smart Security or ESET NOD32 Antivirus.
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Toggle to Advanced Mode by clicking Toggle Advanced mode in the lower left corner or by pressing CTRL + M on your keyboard.

Fig. 1-2
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Click Tools → Scheduler from the main menu on the left to view the main Scheduler/Planner page.
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In the Scheduled tasks window, right-click Regular automatic update and select Edit (See Fig. 1-2 below).

Fig. 1-2
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The Edit task window will appear. Verify that Scheduled task: is set to Update. Click Next twice.
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The Task interval (min.): field is displayed. Enter the number of minutes the system is to wait between virus signature updates. For example, if the desired interval is 2 hours, enter 120 (See Fig. 1-3 below). After establishing the new interval, click Next.

Fig. 1-3 -
A new window will appear. In the event that the update task cannot be completed at the scheduled time, select Wait until the next scheduled time, and click Next.
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A summary window of the new settings will be displayed. Click Finish.
From this point forward virus signature updates will be performed according to the newly scheduled interval.
NOTE: Changing the timing of the regular automatic update is not recommended. By lengthening the amount of time between updates, your system is subject to a greater risk of infection.

