Task Scheduler Tasks Running at the Same Time

Question

We have multiple standard tasks on the task scheduler that calls an application with a parameter. The tasks run at different hours of the morning. However, in the last few days all the tasks have started to trigger of the same time, with a "due to time trigger condition". So now all tasks are running later than usual. We have tried different users and settings and end up with the same result.

Any help will be greatly appreciated.

<?xml version="1.0" encoding="UTF-16"?>
 <Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
<RegistrationInfo>
<Date>2015-07-23T12:32:22.8884306</Date>
<Author>SOUTHAFRICA\User</Author>
<Description>Package</Description>
</RegistrationInfo>
<Triggers>
<CalendarTrigger>
  <StartBoundary>2018-04-11T06:02:30</StartBoundary>
  <Enabled>true</Enabled>
  <ScheduleByWeek>
    <DaysOfWeek>
      <Monday />
      <Tuesday />
      <Wednesday />
      <Thursday />
      <Friday />
    </DaysOfWeek>
    <WeeksInterval>1</WeeksInterval>
  </ScheduleByWeek>
</CalendarTrigger>
</Triggers>
<Principals>
<Principal id="Author">
  <RunLevel>LeastPrivilege</RunLevel>
  <UserId>SOUTHAFRICA\User</UserId>
  <LogonType>Password</LogonType>
</Principal>
</Principals>
<Settings>
<IdleSettings>
  <StopOnIdleEnd>true</StopOnIdleEnd>
  <RestartOnIdle>false</RestartOnIdle>
</IdleSettings>
<MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
<DisallowStartIfOnBatteries>true</DisallowStartIfOnBatteries>
<StopIfGoingOnBatteries>true</StopIfGoingOnBatteries>
<AllowHardTerminate>true</AllowHardTerminate>
<StartWhenAvailable>false</StartWhenAvailable>
<RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
<AllowStartOnDemand>true</AllowStartOnDemand>
<Enabled>false</Enabled>
<Hidden>false</Hidden>
<RunOnlyIfIdle>false</RunOnlyIfIdle>
<WakeToRun>false</WakeToRun>
<ExecutionTimeLimit>P3D</ExecutionTimeLimit>
<Priority>7</Priority>
</Settings>
<Actions Context="Author">
 <Exec>
   <Command>"C:\Program Files (x86)\Application.exe"</Command>
   <Arguments>62</Arguments>
 </Exec>
</Actions>

Answer 1

It seems that a third party anti virus update, created a scheduled task with a trigger of a random delay of 8 hours. So could potentially offset the time of the other scheduled tasks. This is a bug in windows server 2008.

Microsoft Bug Link