computer scan scans all hard drives for malware, such as spyware, viruses and
rootkits. The second full computer scan will be significantly faster because
only the files that have changed will be scanned.
If an archive has not changed
between scans, then it will not be touched in the second scan. If the archive
contains 100 files, then the number of scanned files will be 100 less in the
New virus definition update and
computer restart reset the scan cache. This means that the first scan after the
reset scans all files again and takes a longer time. The following scans will
then be faster again.