On-demand scanning and how it works
The on-demand scanner searches your system’s files, folders, memory, registry, and more looking for any malware that could have infected your system. You decide when and how the on-demand scans occur. You can scan your system manually, at a scheduled time, or for example, when your system boots.
When an attempts is made to open, close, or rename a file, the scanner intercepts the operation and takes these actions.
- The scanner determines if the file, folder, or disk should be scanned based on this criteria:
- If the file, folder, or disk meets the scanning criteria, it is scanned by comparing the information in the file to the known virus signatures in the currently loaded DAT files.
- If it is clean, the result is cached and the next item is checked.
- If it contains a threat, the configured action is taken. For example:
- If it needs to be cleaned, that process is determined by the currently loaded DAT files.
- The results are recorded in the activity log if the scanner was configured to do so.
- In the On-Demand Scan Progress dialog, the information describing the memory, file, folder, or disk name and the action taken is displayed.
- If the memory, file, folder, or disk does not meet the scanning requirements, it is not scanned and the scanner continues until all of the data is scanned.