Your ESET product notifies you with a icon and displays the notification "Operating system is not up to date"
Disable Windows update notifications
These levels correspond to Microsoft's ranking system for updates (low priority, common, important and critical). If you disable Windows update notifications in your ESET product, we recommend you enable update notifications or automatic updating in your Windows operating system as these updates are available to keep your computer fully protected. Click here to learn more about automatic updates from Windows..
No updates: Disable all Windows update notifications
Optional updates: Notified any time Windows updates are available
Recommended updates: Notified when Windows updates marked as common or higher are available
Important updates: Notified when Windows updates marked as important or higher are available
Critical updates: Notified only when Windows updates marked as critical are available (default setting)
In some cases, a third-party firewall will block Windows updates and cause them to fail. Check with your firewall's vendor for instructions on how to allow Windows updates.
Your ESET product is designed to notify you of important updates to your operating system that might contain important patches or bugfixes. You can disable these notifications in your ESET product. Disabling the notifications from your ESET product will not disable the Windows Update process or the notifications from the Windows operating system itself.
Click Tools and expand Microsoft Windows Update. In the Notify about Microsoft Windows system updates drop-down menu, select No updates and click OK. You will no longer receive Windows update notifications from your ESET product.
Expand Tools, click System updates and then select No updates from the Notify about missing updates from level drop-down menu. Click OK to save your changes. You will no longer receive Windows update notifications from your ESET product about Windows unless you make a change to this setting.
Windows 10 updates
Due to the methods by which operating system updates are delivered in Microsoft Windows 10, certain device or driver updates might fail during a normal operating system update, meaning you will continue to be notified of available updates by your ESET product. To resolve this issue, you will need to perform a manual update these devices and drivers.
If you know the specific driver(s) or device(s) failing to update, follow the steps below to manually update them:
Open Device Manager.
Click View → Show hidden devices.
Use the tree to navigate to the driver or device that requires a manual update, right-click it, and select Update Driver Software from the context menu.
Click Search automatically for updated driver software. If an update is available, it will automatically be installed. In some cases, a system restart may be required to allow the newer driver to load.