Check for the latest virus and spyware definitions before running a scheduled scan

This policy setting allows you to manage whether a check for new virus and spyware definitions will occur before running a scan. This setting applies to scheduled scans as well as the command line “mpcmdrun -SigUpdate” but it has no effect on scans initiated manually from the user interface. If you enable this setting a check for new definitions will occur before running a scan. If you disable this setting or do not configure this setting the scan will start using the existing definitions.

Additional Information

  1. Registry path is:

    HKEY_LOCAL_MACHINE -> Software -> Policies -> Microsoft -> Windows Defender -> Scan # CheckForSignaturesBeforeRunningScan

  2. The Administrative Template path is:

    Windows Components -> Windows Defender -> Scan


* Making mistakes while changing registry values can affect your system adversely. We recommend you to create a System Restore point before making registry manipulation. If you're new to Registry Editor, read this beginner's guide.
** To locate the registry and administrative template path, checkout beginner's guide.
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