Multiscanning is running multiple anti-malware or antivirus engines concurrently.
Traditionally, only a single engine can actively scan a system at a given time.
Using multiple engines simultaneously can result in conflicts that lead to system freezes and application failures.
Testing agencies published results showing that no single antivirus engine is 100% effective against every malware threat.
[3][4] Because each engine uses different scanning methodologies and updates their malware definition files at various frequencies, using multiple engines increases the likelihood of catching malware before it can affect a system or network.