NANO Antivirus monitors files and web traffic, scans selected locations, checks removable media, and moves detected objects into quarantine. Its resident service runs in the background while the visible control window shows status, tasks, reports, and settings. Closing that window does not end protection. NANO Antivirus examines activity on the computer, but its web scanner is not a firewall and does not decide which programs may open network connections.
Choose a scan task
A NANO Antivirus quick task concentrates on common infection locations, while a full task reads a much larger set of files. A custom task limits work to selected drives, folders, or objects. Removable-media settings can start a scan or ask for an action when a new device appears. The first full scan may take considerable time because every readable file enters the workload.
Detection actions need review. Quarantine isolates an object so ordinary programs cannot open it from the original path. An affected program may then fail because one component has moved. Read the detection name, original location, and event time before restoring anything. Restoring an unknown executable puts it back into use; deleting it removes the quarantine copy.
Keep exclusions narrow
Trusted Zone rules exclude selected objects or processes from designated checks. They can solve a confirmed false detection or avoid repeated scanning of controlled data, but they also create inspection gaps. Excluding a whole Downloads folder is much broader than excluding one verified file. Add the smallest path possible and remove the rule when the reason no longer exists.
An exclusion does not prove that the object is safe. If an update changes the file, the old trust decision may no longer describe it. Keep the source and publisher record needed to reassess the file instead of treating Trusted Zone as a permanent approval list.
Handle other protection
NANO Antivirus can enter Compatibility Mode when it detects another antivirus product. That mode disables or changes functions likely to conflict. Two resident scanners can intercept the same file operation, slow the computer, or block each other’s updates. Compatibility Mode reduces conflict, but it also means the dashboard may show less protection than the normal configuration.
Decide which resident product owns real-time scanning. Do not assume two installed products create double protection. If another product has been removed, restart and check whether Compatibility Mode remains active before relying on the normal status display.
Protect online updates
The free NANO Antivirus installation depends on Internet access for setup and threat updates. A separate firewall or network filter can block the update process even while websites open normally. Allow the documented service addresses and program processes rather than disabling the firewall entirely. An old threat database reduces signature coverage without necessarily stopping the resident service.
Game Mode suppresses selected notifications and scheduled work so a full-screen session receives fewer interruptions. It does not turn every protection component off. That distinction matters when a file starts during a game: the resident monitor can still block it even though routine messages remain hidden. Check reports afterward if an installation or launcher silently failed. Scheduled scans also need the computer to be powered on at the chosen time, and a missed task may wait until its next schedule rather than starting the moment the computer wakes.
