Newly-created files have a higher probability of infection than existing files and are scanned with additional parameters. In addition to signature-based scanning methods, advanced heuristics are used, which greatly improves detection rates. Self-extracting files (SFX) and runtime packers (internally compressed executable files) are also scanned. By default, archives are scanned up to the 10th nesting level and are checked regardless of their actual size. Deselect the Default archive scan settings option to modify archive scan settings.