Windows Defender scheduled task not working on Windows 10 (0x8007042b)

[vasametropolis]

I'd like to set up a daily scan for Windows Defender. I went into the task scheduler and successfully created a task to run once daily, but it never runs. All the Windows Defender tasks have "The process terminated unexpectedly (0x8007042b)" next to them.

Since the scan is the one bugging me the most, here is the XML of that task:

<?xml version="1.0" encoding="UTF-16"?>
<Task version="1.5" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
<RegistrationInfo>
<Author>Lucas-PC\Lucas</Author>
<Description>Periodic scan task.</Description>
<URI>\Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan</URI>
</RegistrationInfo>
<Triggers>
<CalendarTrigger>
<StartBoundary>2015-08-28T00:00:00-07:00</StartBoundary>
<Enabled>true</Enabled>
<ScheduleByDay>
<DaysInterval>1</DaysInterval>
</ScheduleByDay>
</CalendarTrigger>
</Triggers>
<Principals>
<Principal id="LocalSystem">
<UserId>S-1-5-18</UserId>
<RunLevel>HighestAvailable</RunLevel>
</Principal>
</Principals>
<Settings>
<MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
<DisallowStartIfOnBatteries>true</DisallowStartIfOnBatteries>
<StopIfGoingOnBatteries>false</StopIfGoingOnBatteries>
<AllowHardTerminate>true</AllowHardTerminate>
<StartWhenAvailable>true</StartWhenAvailable>
<RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
<IdleSettings>
<StopOnIdleEnd>true</StopOnIdleEnd>
<RestartOnIdle>false</RestartOnIdle>
</IdleSettings>
<AllowStartOnDemand>true</AllowStartOnDemand>
<Enabled>true</Enabled>
<Hidden>true</Hidden>
<RunOnlyIfIdle>false</RunOnlyIfIdle>
<DisallowStartOnRemoteAppSession>false</DisallowStartOnRemoteAppSession>
<UseUnifiedSchedulingEngine>true</UseUnifiedSchedulingEngine>
<MaintenanceSettings>
<Period>P1D</Period>
<Deadline>P7D</Deadline>
<Exclusive>false</Exclusive>
</MaintenanceSettings>
<WakeToRun>false</WakeToRun>
<ExecutionTimeLimit>PT1H</ExecutionTimeLimit>
<Priority>7</Priority>
<RestartOnFailure>
<Interval>PT1M</Interval>
<Count>3</Count>
</RestartOnFailure>
</Settings>
<Actions Context="LocalSystem">
<Exec>
<Command>%ProgramFiles%\Windows Defender\MpCmdRun.exe</Command>
<Arguments>Scan -ScheduleJob</Arguments>
</Exec>
</Actions>
</Task>

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