An event is scheduled (such as LiveUpdate or a scheduled scan) to run daily, and the Handle Missed Events option is enabled. When the computer misses a scheduled event, the event does not take place immediately when the computer becomes available.
A missed event is defined as an event that has not triggered when scheduled (for example, the computer is not running when an event is scheduled to occur). If a scheduled event triggers as scheduled and is interrupted (that is, stopped by the user) then the event was not missed, but incomplete. In this case, the missed-event policy does not apply.
When a scheduled event is missed, Symantec AntiVirus checks to see if we are still within the missed event Window.
Daily events will have a window indicated in hours. Weekly events will have a window indicated in days. Monthly events will have a window indicated in days.
The product performs event checks every minute. If it is past the event's scheduled time, but is within the event's "window" then the event will run. If it is past the scheduled time and past the "window" then the SkipEvent registry key for the scan will increment by 1. The SkipEvent value is set to the number of times this event and its missed event window has been skipped. If the end user continues to miss the event and its window, then the SkipEvent key will continue to increment. Once the SkipEvent value becomes equal to or greater than the AllowSkipEvent value, then this will force the event to run. Once the event is run then the SkipEvent value will automatically reset to 0.
The AllowSkipEvent registry value is the number of times an event is allowed to be skipped prior to automatically running the event. The key is not present by default in SAV 9 or SAV 10 and its default is 3 even when it is not present. The key can be and set to another value if it is desired to change the amount of skipevents to allow before running an event.
If an AllowSkipEvent is created the key is located under HKEY_LOCAL_MACHINE\SOFTWARE\INTEL\LANDesk\VirusProtect6\CurrentVersion. This will force all scheduled scans or scheduled liveupdate sessions which are configured to use the missed event windows to use the AllowSkipEvent key.
To force events to run every time there is only one missed event, set the AllowSkipEvent value to 1.
Technical Information Adding the registry value if it does not exist
If the AllowSkipEvent value does not exist, create it using the steps below. Be sure to create a back up of the registry prior to following these steps.